./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8 --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 32bit --witnessprinter.graph.data.programhash 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 --- 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-e04fb08 [2022-11-16 12:43:27,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:43:27,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:43:27,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:43:27,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:43:27,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:43:27,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:43:27,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:43:27,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:43:27,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:43:27,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:43:27,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:43:27,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:43:27,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:43:27,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:43:27,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:43:27,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:43:27,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:43:27,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:43:27,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:43:27,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:43:27,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:43:27,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:43:27,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:43:27,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:43:27,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:43:27,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:43:27,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:43:27,321 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:43:27,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:43:27,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:43:27,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:43:27,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:43:27,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:43:27,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:43:27,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:43:27,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:43:27,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:43:27,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:43:27,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:43:27,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:43:27,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:43:27,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:43:27,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:43:27,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:43:27,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:43:27,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:43:27,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:43:27,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:43:27,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:43:27,372 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:43:27,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:43:27,373 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:43:27,374 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:43:27,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:43:27,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:43:27,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:43:27,375 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:43:27,375 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:43:27,376 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:43:27,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:43:27,376 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:43:27,377 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:43:27,377 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:43:27,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:43:27,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:43:27,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:43:27,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:43:27,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:43:27,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:43:27,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:43:27,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:43:27,380 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_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 [2022-11-16 12:43:27,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:43:27,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:43:27,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:43:27,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:43:27,825 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:43:27,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2022-11-16 12:43:27,900 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/data/a3fe5bc91/d8963c6083434061bc0644a58c066b9f/FLAG4baaf2668 [2022-11-16 12:43:28,542 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:43:28,551 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2022-11-16 12:43:28,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/data/a3fe5bc91/d8963c6083434061bc0644a58c066b9f/FLAG4baaf2668 [2022-11-16 12:43:28,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/data/a3fe5bc91/d8963c6083434061bc0644a58c066b9f [2022-11-16 12:43:28,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:43:28,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:43:28,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:43:28,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:43:28,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:43:28,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:43:28" (1/1) ... [2022-11-16 12:43:28,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b926c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:28, skipping insertion in model container [2022-11-16 12:43:28,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:43:28" (1/1) ... [2022-11-16 12:43:28,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:43:28,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:43:29,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:43:29,391 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:43:29,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:43:29,525 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:43:29,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29 WrapperNode [2022-11-16 12:43:29,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:43:29,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:43:29,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:43:29,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:43:29,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,615 INFO L138 Inliner]: procedures = 125, calls = 94, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 304 [2022-11-16 12:43:29,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:43:29,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:43:29,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:43:29,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:43:29,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,695 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:43:29,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:43:29,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:43:29,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:43:29,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (1/1) ... [2022-11-16 12:43:29,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:43:29,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:29,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:43:29,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:43:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:43:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:43:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:43:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:43:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:43:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:43:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:43:29,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:43:29,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:43:29,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:43:29,807 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-11-16 12:43:29,807 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-11-16 12:43:29,997 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:43:29,999 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:43:31,139 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:43:31,152 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:43:31,156 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-16 12:43:31,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:43:31 BoogieIcfgContainer [2022-11-16 12:43:31,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:43:31,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:43:31,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:43:31,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:43:31,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:43:28" (1/3) ... [2022-11-16 12:43:31,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3e27c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:43:31, skipping insertion in model container [2022-11-16 12:43:31,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:43:29" (2/3) ... [2022-11-16 12:43:31,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3e27c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:43:31, skipping insertion in model container [2022-11-16 12:43:31,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:43:31" (3/3) ... [2022-11-16 12:43:31,192 INFO L112 eAbstractionObserver]: Analyzing ICFG split_list_test05-1.i [2022-11-16 12:43:31,213 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:43:31,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2022-11-16 12:43:31,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:43:31,297 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;@5111a16c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:43:31,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2022-11-16 12:43:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:43:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:43:31,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:31,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:43:31,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-11-16 12:43:31,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:31,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027413417] [2022-11-16 12:43:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:31,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:31,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:31,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027413417] [2022-11-16 12:43:31,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027413417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:31,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:31,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:43:31,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906112449] [2022-11-16 12:43:31,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:31,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:43:31,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:31,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:43:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:43:31,583 INFO L87 Difference]: Start difference. First operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:32,217 INFO L93 Difference]: Finished difference Result 548 states and 601 transitions. [2022-11-16 12:43:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:43:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:43:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:32,234 INFO L225 Difference]: With dead ends: 548 [2022-11-16 12:43:32,234 INFO L226 Difference]: Without dead ends: 546 [2022-11-16 12:43:32,236 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 [2022-11-16 12:43:32,240 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 246 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:32,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 436 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:43:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-11-16 12:43:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 407. [2022-11-16 12:43:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 247 states have (on average 2.0890688259109313) internal successors, (516), 393 states have internal predecessors, (516), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:43:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 544 transitions. [2022-11-16 12:43:32,315 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 544 transitions. Word has length 3 [2022-11-16 12:43:32,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:32,316 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 544 transitions. [2022-11-16 12:43:32,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 544 transitions. [2022-11-16 12:43:32,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:43:32,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:32,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:43:32,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:43:32,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:32,319 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-11-16 12:43:32,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:32,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689652071] [2022-11-16 12:43:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:32,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:32,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:32,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689652071] [2022-11-16 12:43:32,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689652071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:32,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:32,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:43:32,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331205852] [2022-11-16 12:43:32,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:32,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:43:32,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:32,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:43:32,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:43:32,464 INFO L87 Difference]: Start difference. First operand 407 states and 544 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:32,767 INFO L93 Difference]: Finished difference Result 408 states and 547 transitions. [2022-11-16 12:43:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:43:32,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:43:32,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:32,774 INFO L225 Difference]: With dead ends: 408 [2022-11-16 12:43:32,774 INFO L226 Difference]: Without dead ends: 408 [2022-11-16 12:43:32,778 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 [2022-11-16 12:43:32,780 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 6 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:32,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 554 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:43:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-16 12:43:32,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 405. [2022-11-16 12:43:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 247 states have (on average 2.080971659919028) internal successors, (514), 391 states have internal predecessors, (514), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:43:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 542 transitions. [2022-11-16 12:43:32,821 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 542 transitions. Word has length 3 [2022-11-16 12:43:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:32,822 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 542 transitions. [2022-11-16 12:43:32,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 542 transitions. [2022-11-16 12:43:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:43:32,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:32,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:32,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:43:32,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390162, now seen corresponding path program 1 times [2022-11-16 12:43:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:32,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562912455] [2022-11-16 12:43:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:32,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:32,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:32,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562912455] [2022-11-16 12:43:32,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562912455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:32,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:32,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:43:32,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365468261] [2022-11-16 12:43:32,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:32,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:43:32,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:32,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:43:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:43:32,960 INFO L87 Difference]: Start difference. First operand 405 states and 542 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:33,214 INFO L93 Difference]: Finished difference Result 400 states and 537 transitions. [2022-11-16 12:43:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:43:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:43:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:33,216 INFO L225 Difference]: With dead ends: 400 [2022-11-16 12:43:33,217 INFO L226 Difference]: Without dead ends: 400 [2022-11-16 12:43:33,217 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 [2022-11-16 12:43:33,218 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 43 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:33,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 497 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:43:33,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-16 12:43:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-11-16 12:43:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 247 states have (on average 2.0607287449392713) internal successors, (509), 386 states have internal predecessors, (509), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:43:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 537 transitions. [2022-11-16 12:43:33,236 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 537 transitions. Word has length 10 [2022-11-16 12:43:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:33,237 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 537 transitions. [2022-11-16 12:43:33,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 537 transitions. [2022-11-16 12:43:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:43:33,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:33,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:33,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:43:33,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:33,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390163, now seen corresponding path program 1 times [2022-11-16 12:43:33,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993317430] [2022-11-16 12:43:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:33,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:33,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993317430] [2022-11-16 12:43:33,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993317430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:33,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:33,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:43:33,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659089190] [2022-11-16 12:43:33,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:33,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:43:33,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:43:33,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:43:33,362 INFO L87 Difference]: Start difference. First operand 400 states and 537 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:33,600 INFO L93 Difference]: Finished difference Result 395 states and 532 transitions. [2022-11-16 12:43:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:43:33,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:43:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:33,603 INFO L225 Difference]: With dead ends: 395 [2022-11-16 12:43:33,603 INFO L226 Difference]: Without dead ends: 395 [2022-11-16 12:43:33,603 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 [2022-11-16 12:43:33,604 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 38 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:33,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 510 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:43:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-16 12:43:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-11-16 12:43:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 247 states have (on average 2.0404858299595143) internal successors, (504), 381 states have internal predecessors, (504), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:43:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 532 transitions. [2022-11-16 12:43:33,619 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 532 transitions. Word has length 10 [2022-11-16 12:43:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:33,619 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 532 transitions. [2022-11-16 12:43:33,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 532 transitions. [2022-11-16 12:43:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:43:33,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:33,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:33,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:43:33,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash 279357079, now seen corresponding path program 1 times [2022-11-16 12:43:33,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:33,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049094363] [2022-11-16 12:43:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:33,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:33,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:33,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049094363] [2022-11-16 12:43:33,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049094363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:33,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:33,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:43:33,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640003592] [2022-11-16 12:43:33,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:33,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:43:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:43:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:43:33,831 INFO L87 Difference]: Start difference. First operand 395 states and 532 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:34,561 INFO L93 Difference]: Finished difference Result 523 states and 574 transitions. [2022-11-16 12:43:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:43:34,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:43:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:34,569 INFO L225 Difference]: With dead ends: 523 [2022-11-16 12:43:34,570 INFO L226 Difference]: Without dead ends: 523 [2022-11-16 12:43:34,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:43:34,572 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 318 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:34,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 806 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:43:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-16 12:43:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 387. [2022-11-16 12:43:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 247 states have (on average 2.0080971659919027) internal successors, (496), 373 states have internal predecessors, (496), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:43:34,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 524 transitions. [2022-11-16 12:43:34,601 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 524 transitions. Word has length 11 [2022-11-16 12:43:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:34,601 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 524 transitions. [2022-11-16 12:43:34,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:34,602 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 524 transitions. [2022-11-16 12:43:34,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:43:34,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:34,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:34,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:43:34,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash 279357080, now seen corresponding path program 1 times [2022-11-16 12:43:34,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:34,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974925696] [2022-11-16 12:43:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:34,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:34,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974925696] [2022-11-16 12:43:34,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974925696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:34,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:34,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:43:34,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343949693] [2022-11-16 12:43:34,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:34,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:43:34,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:34,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:43:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:43:34,975 INFO L87 Difference]: Start difference. First operand 387 states and 524 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:35,840 INFO L93 Difference]: Finished difference Result 513 states and 564 transitions. [2022-11-16 12:43:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:43:35,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:43:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:35,843 INFO L225 Difference]: With dead ends: 513 [2022-11-16 12:43:35,843 INFO L226 Difference]: Without dead ends: 513 [2022-11-16 12:43:35,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:43:35,845 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 810 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:35,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 447 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:43:35,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-16 12:43:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 378. [2022-11-16 12:43:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 247 states have (on average 1.9676113360323886) internal successors, (486), 364 states have internal predecessors, (486), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:43:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2022-11-16 12:43:35,860 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 11 [2022-11-16 12:43:35,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:35,861 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2022-11-16 12:43:35,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2022-11-16 12:43:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:43:35,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:35,863 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] [2022-11-16 12:43:35,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:43:35,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:35,864 INFO L85 PathProgramCache]: Analyzing trace with hash 693745101, now seen corresponding path program 1 times [2022-11-16 12:43:35,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507371356] [2022-11-16 12:43:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:35,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:36,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:36,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507371356] [2022-11-16 12:43:36,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507371356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:36,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:36,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:43:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480165451] [2022-11-16 12:43:36,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:36,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:43:36,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:43:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:43:36,364 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:36,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:36,845 INFO L93 Difference]: Finished difference Result 398 states and 537 transitions. [2022-11-16 12:43:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:43:36,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:43:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:36,848 INFO L225 Difference]: With dead ends: 398 [2022-11-16 12:43:36,848 INFO L226 Difference]: Without dead ends: 398 [2022-11-16 12:43:36,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:43:36,849 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 32 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:36,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1568 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:43:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-16 12:43:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 386. [2022-11-16 12:43:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 254 states have (on average 1.9448818897637796) internal successors, (494), 371 states have internal predecessors, (494), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:43:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 524 transitions. [2022-11-16 12:43:36,862 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 524 transitions. Word has length 20 [2022-11-16 12:43:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:36,862 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 524 transitions. [2022-11-16 12:43:36,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 524 transitions. [2022-11-16 12:43:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:43:36,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:36,863 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] [2022-11-16 12:43:36,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:43:36,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:36,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:36,865 INFO L85 PathProgramCache]: Analyzing trace with hash -964577360, now seen corresponding path program 1 times [2022-11-16 12:43:36,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:36,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194846716] [2022-11-16 12:43:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:36,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:37,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:37,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194846716] [2022-11-16 12:43:37,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194846716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:43:37,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:43:37,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:43:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334761002] [2022-11-16 12:43:37,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:43:37,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:43:37,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:37,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:43:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:43:37,467 INFO L87 Difference]: Start difference. First operand 386 states and 524 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:38,394 INFO L93 Difference]: Finished difference Result 526 states and 579 transitions. [2022-11-16 12:43:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:43:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 12:43:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:38,397 INFO L225 Difference]: With dead ends: 526 [2022-11-16 12:43:38,398 INFO L226 Difference]: Without dead ends: 526 [2022-11-16 12:43:38,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:43:38,399 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 764 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:38,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 1277 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:43:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-11-16 12:43:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 389. [2022-11-16 12:43:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 257 states have (on average 1.933852140077821) internal successors, (497), 374 states have internal predecessors, (497), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:43:38,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2022-11-16 12:43:38,414 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 22 [2022-11-16 12:43:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:38,414 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2022-11-16 12:43:38,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:43:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2022-11-16 12:43:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 12:43:38,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:38,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:38,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:43:38,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:38,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:38,418 INFO L85 PathProgramCache]: Analyzing trace with hash -339455757, now seen corresponding path program 1 times [2022-11-16 12:43:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:38,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872915330] [2022-11-16 12:43:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:39,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:43:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:39,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872915330] [2022-11-16 12:43:39,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872915330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168107689] [2022-11-16 12:43:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:39,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:39,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:39,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:39,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:43:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:40,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 12:43:40,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:40,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:43:40,448 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 13 treesize of output 9 [2022-11-16 12:43:40,562 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:43:40,563 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 16 treesize of output 22 [2022-11-16 12:43:40,577 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 7 treesize of output 3 [2022-11-16 12:43:40,720 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:43:40,721 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 31 treesize of output 37 [2022-11-16 12:43:40,753 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:43:40,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:43:40,921 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-16 12:43:40,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 12:43:41,145 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-16 12:43:41,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-11-16 12:43:41,250 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 38 treesize of output 36 [2022-11-16 12:43:41,437 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 38 treesize of output 36 [2022-11-16 12:43:41,506 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 38 treesize of output 36 [2022-11-16 12:43:41,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:43:41,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 17 [2022-11-16 12:43:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:41,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:42,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:42,082 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 33 treesize of output 34 [2022-11-16 12:43:42,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:42,107 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 332 treesize of output 214 [2022-11-16 12:43:42,120 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 91 treesize of output 83 [2022-11-16 12:43:42,130 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 174 treesize of output 158 [2022-11-16 12:43:42,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168107689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:42,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:42,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2022-11-16 12:43:42,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941923539] [2022-11-16 12:43:42,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:42,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:43:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:43:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=883, Unknown=8, NotChecked=0, Total=992 [2022-11-16 12:43:42,413 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:43:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:43:44,021 INFO L93 Difference]: Finished difference Result 432 states and 590 transitions. [2022-11-16 12:43:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:43:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-16 12:43:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:43:44,024 INFO L225 Difference]: With dead ends: 432 [2022-11-16 12:43:44,025 INFO L226 Difference]: Without dead ends: 432 [2022-11-16 12:43:44,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=1246, Unknown=8, NotChecked=0, Total=1406 [2022-11-16 12:43:44,026 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 97 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 3179 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 533 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:43:44,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 3179 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1511 Invalid, 0 Unknown, 533 Unchecked, 1.1s Time] [2022-11-16 12:43:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-16 12:43:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 426. [2022-11-16 12:43:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 290 states have (on average 1.8551724137931034) internal successors, (538), 409 states have internal predecessors, (538), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (32), 15 states have call predecessors, (32), 17 states have call successors, (32) [2022-11-16 12:43:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 587 transitions. [2022-11-16 12:43:44,051 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 587 transitions. Word has length 37 [2022-11-16 12:43:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:43:44,052 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 587 transitions. [2022-11-16 12:43:44,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.423076923076923) internal successors, (63), 23 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:43:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 587 transitions. [2022-11-16 12:43:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 12:43:44,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:43:44,058 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:43:44,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:43:44,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:44,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:43:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:43:44,265 INFO L85 PathProgramCache]: Analyzing trace with hash -339455756, now seen corresponding path program 1 times [2022-11-16 12:43:44,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:43:44,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228829064] [2022-11-16 12:43:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:43:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:45,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:43:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:45,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:43:45,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228829064] [2022-11-16 12:43:45,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228829064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:45,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134036606] [2022-11-16 12:43:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:43:45,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:43:45,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:43:45,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:43:45,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:43:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:43:45,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-16 12:43:46,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:43:46,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:43:46,334 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 13 treesize of output 9 [2022-11-16 12:43:46,340 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 13 treesize of output 9 [2022-11-16 12:43:46,438 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:43:46,439 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 16 treesize of output 22 [2022-11-16 12:43:46,462 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:43:46,462 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 16 treesize of output 22 [2022-11-16 12:43:46,475 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 7 treesize of output 3 [2022-11-16 12:43:46,485 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 7 treesize of output 3 [2022-11-16 12:43:46,625 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:43:46,626 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 40 treesize of output 46 [2022-11-16 12:43:46,646 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:43:46,647 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 38 treesize of output 44 [2022-11-16 12:43:46,689 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:43:46,736 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:43:46,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:43:46,954 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-16 12:43:46,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 12:43:47,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:43:47,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 12:43:47,239 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-16 12:43:47,239 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 22 treesize of output 24 [2022-11-16 12:43:47,336 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 46 treesize of output 44 [2022-11-16 12:43:47,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-16 12:43:47,495 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 46 treesize of output 44 [2022-11-16 12:43:47,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-16 12:43:47,564 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 46 treesize of output 44 [2022-11-16 12:43:47,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-16 12:43:47,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:43:47,663 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-16 12:43:47,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:43:47,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-16 12:43:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:43:47,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:43:47,825 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_509 (Array Int Int)) (v_ArrVal_510 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_510) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_509) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_510 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_510) c_append_~head.base) .cse0) 5))))) is different from false [2022-11-16 12:43:48,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:48,472 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 102 treesize of output 103 [2022-11-16 12:43:48,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:48,498 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 122 treesize of output 113 [2022-11-16 12:43:48,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:48,522 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 275 treesize of output 205 [2022-11-16 12:43:48,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:48,556 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 1060 treesize of output 996 [2022-11-16 12:43:48,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:43:48,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1656 treesize of output 1566 [2022-11-16 12:43:48,674 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 1528 treesize of output 1388 [2022-11-16 12:43:48,717 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 1359 treesize of output 1231 [2022-11-16 12:43:48,756 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 1231 treesize of output 1159 [2022-11-16 12:43:48,795 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 1196 treesize of output 1120 [2022-11-16 12:43:48,841 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 1095 treesize of output 1079 [2022-11-16 12:43:58,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134036606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:43:58,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:43:58,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2022-11-16 12:43:58,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453816165] [2022-11-16 12:43:58,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:43:58,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:43:58,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:43:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:43:58,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=900, Unknown=1, NotChecked=60, Total=1056 [2022-11-16 12:43:58,294 INFO L87 Difference]: Start difference. First operand 426 states and 587 transitions. Second operand has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:44:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:03,784 INFO L93 Difference]: Finished difference Result 974 states and 1203 transitions. [2022-11-16 12:44:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:44:03,785 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-16 12:44:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:03,789 INFO L225 Difference]: With dead ends: 974 [2022-11-16 12:44:03,789 INFO L226 Difference]: Without dead ends: 974 [2022-11-16 12:44:03,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=227, Invalid=1938, Unknown=1, NotChecked=90, Total=2256 [2022-11-16 12:44:03,791 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 846 mSDsluCounter, 5424 mSDsCounter, 0 mSdLazyCounter, 5014 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 5853 SdHoareTripleChecker+Invalid, 7312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 5014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2230 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:03,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 5853 Invalid, 7312 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 5014 Invalid, 0 Unknown, 2230 Unchecked, 3.9s Time] [2022-11-16 12:44:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-11-16 12:44:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 490. [2022-11-16 12:44:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 340 states have (on average 1.7676470588235293) internal successors, (601), 459 states have internal predecessors, (601), 30 states have call successors, (30), 5 states have call predecessors, (30), 4 states have return successors, (56), 29 states have call predecessors, (56), 30 states have call successors, (56) [2022-11-16 12:44:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 687 transitions. [2022-11-16 12:44:03,814 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 687 transitions. Word has length 37 [2022-11-16 12:44:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:03,814 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 687 transitions. [2022-11-16 12:44:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:44:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 687 transitions. [2022-11-16 12:44:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:44:03,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:03,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:03,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:04,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:44:04,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:44:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:04,023 INFO L85 PathProgramCache]: Analyzing trace with hash -794458392, now seen corresponding path program 1 times [2022-11-16 12:44:04,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:04,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028412521] [2022-11-16 12:44:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:04,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:04,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028412521] [2022-11-16 12:44:05,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028412521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935931928] [2022-11-16 12:44:05,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:05,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:05,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:05,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:05,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:44:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:05,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 12:44:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:05,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:44:05,587 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 13 treesize of output 9 [2022-11-16 12:44:05,648 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:44:05,648 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 16 treesize of output 22 [2022-11-16 12:44:05,659 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 7 treesize of output 3 [2022-11-16 12:44:05,713 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:44:05,714 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 20 treesize of output 26 [2022-11-16 12:44:05,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:05,798 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-16 12:44:05,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 12:44:05,950 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-16 12:44:05,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-11-16 12:44:06,030 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 38 treesize of output 36 [2022-11-16 12:44:06,232 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 38 treesize of output 36 [2022-11-16 12:44:06,286 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 38 treesize of output 36 [2022-11-16 12:44:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:06,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2022-11-16 12:44:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:06,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:06,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:06,872 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 33 treesize of output 34 [2022-11-16 12:44:06,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:06,887 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 332 treesize of output 214 [2022-11-16 12:44:06,896 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 91 treesize of output 83 [2022-11-16 12:44:06,904 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 174 treesize of output 158 [2022-11-16 12:44:07,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935931928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:07,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:07,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2022-11-16 12:44:07,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635481966] [2022-11-16 12:44:07,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:07,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 12:44:07,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 12:44:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1060, Unknown=10, NotChecked=0, Total=1190 [2022-11-16 12:44:07,254 INFO L87 Difference]: Start difference. First operand 490 states and 687 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:44:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:09,549 INFO L93 Difference]: Finished difference Result 673 states and 816 transitions. [2022-11-16 12:44:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:44:09,549 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-16 12:44:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:09,553 INFO L225 Difference]: With dead ends: 673 [2022-11-16 12:44:09,553 INFO L226 Difference]: Without dead ends: 673 [2022-11-16 12:44:09,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=336, Invalid=2104, Unknown=10, NotChecked=0, Total=2450 [2022-11-16 12:44:09,554 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 1442 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:09,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 2150 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1760 Invalid, 0 Unknown, 674 Unchecked, 1.4s Time] [2022-11-16 12:44:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-16 12:44:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 497. [2022-11-16 12:44:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 347 states have (on average 1.7521613832853027) internal successors, (608), 466 states have internal predecessors, (608), 30 states have call successors, (30), 5 states have call predecessors, (30), 4 states have return successors, (56), 29 states have call predecessors, (56), 30 states have call successors, (56) [2022-11-16 12:44:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 694 transitions. [2022-11-16 12:44:09,574 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 694 transitions. Word has length 39 [2022-11-16 12:44:09,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:09,575 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 694 transitions. [2022-11-16 12:44:09,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:44:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 694 transitions. [2022-11-16 12:44:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:44:09,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:09,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:09,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:09,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:44:09,782 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:44:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash -794458391, now seen corresponding path program 1 times [2022-11-16 12:44:09,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:09,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084769248] [2022-11-16 12:44:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:09,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:11,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:11,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084769248] [2022-11-16 12:44:11,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084769248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398679825] [2022-11-16 12:44:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:11,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:11,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:11,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:11,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:44:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:11,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 12:44:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:11,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:44:11,885 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 13 treesize of output 9 [2022-11-16 12:44:11,890 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 13 treesize of output 9 [2022-11-16 12:44:11,979 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:44:11,980 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 16 treesize of output 22 [2022-11-16 12:44:11,999 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:44:12,000 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 16 treesize of output 22 [2022-11-16 12:44:12,013 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 7 treesize of output 3 [2022-11-16 12:44:12,026 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 7 treesize of output 3 [2022-11-16 12:44:12,149 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:44:12,149 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 40 treesize of output 46 [2022-11-16 12:44:12,171 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:44:12,171 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 38 treesize of output 44 [2022-11-16 12:44:12,204 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:44:12,233 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 12:44:12,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:12,469 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-16 12:44:12,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 12:44:12,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:12,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 12:44:12,769 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-16 12:44:12,769 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 22 treesize of output 24 [2022-11-16 12:44:12,852 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 46 treesize of output 44 [2022-11-16 12:44:12,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-16 12:44:13,004 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 46 treesize of output 44 [2022-11-16 12:44:13,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-16 12:44:13,061 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 46 treesize of output 44 [2022-11-16 12:44:13,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-16 12:44:13,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:13,145 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-16 12:44:13,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:13,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-16 12:44:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:13,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:13,293 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_887 (Array Int Int)) (v_ArrVal_888 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_888) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_887) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_888 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_888) c_append_~head.base) .cse0) 5))))) is different from false [2022-11-16 12:44:13,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:13,839 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 102 treesize of output 103 [2022-11-16 12:44:13,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:13,853 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 122 treesize of output 113 [2022-11-16 12:44:13,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:13,871 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 481 treesize of output 345 [2022-11-16 12:44:13,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:13,892 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 1060 treesize of output 996 [2022-11-16 12:44:13,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:13,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1656 treesize of output 1566 [2022-11-16 12:44:13,974 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 1528 treesize of output 1388 [2022-11-16 12:44:14,003 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 1359 treesize of output 1287 [2022-11-16 12:44:14,032 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 1287 treesize of output 1159 [2022-11-16 12:44:14,060 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 1196 treesize of output 1120 [2022-11-16 12:44:14,093 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 1095 treesize of output 1079 [2022-11-16 12:44:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398679825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:15,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:44:15,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2022-11-16 12:44:15,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341198626] [2022-11-16 12:44:15,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:15,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:44:15,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:15,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:44:15,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=898, Unknown=1, NotChecked=60, Total=1056 [2022-11-16 12:44:15,695 INFO L87 Difference]: Start difference. First operand 497 states and 694 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:44:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:18,640 INFO L93 Difference]: Finished difference Result 603 states and 824 transitions. [2022-11-16 12:44:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:44:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-16 12:44:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:18,643 INFO L225 Difference]: With dead ends: 603 [2022-11-16 12:44:18,643 INFO L226 Difference]: Without dead ends: 603 [2022-11-16 12:44:18,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=297, Invalid=2156, Unknown=1, NotChecked=96, Total=2550 [2022-11-16 12:44:18,645 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 150 mSDsluCounter, 3216 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1095 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:18,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 3534 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1812 Invalid, 0 Unknown, 1095 Unchecked, 1.1s Time] [2022-11-16 12:44:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-11-16 12:44:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 561. [2022-11-16 12:44:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 407 states have (on average 1.6756756756756757) internal successors, (682), 525 states have internal predecessors, (682), 33 states have call successors, (33), 8 states have call predecessors, (33), 5 states have return successors, (61), 31 states have call predecessors, (61), 33 states have call successors, (61) [2022-11-16 12:44:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 776 transitions. [2022-11-16 12:44:18,663 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 776 transitions. Word has length 39 [2022-11-16 12:44:18,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:18,664 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 776 transitions. [2022-11-16 12:44:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:44:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 776 transitions. [2022-11-16 12:44:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:44:18,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:18,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:18,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:18,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:44:18,875 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:44:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1733156522, now seen corresponding path program 1 times [2022-11-16 12:44:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:18,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827105940] [2022-11-16 12:44:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:19,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:19,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827105940] [2022-11-16 12:44:19,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827105940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178089160] [2022-11-16 12:44:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:19,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:19,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:19,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:19,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:44:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:19,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 12:44:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:19,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:44:20,057 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 [2022-11-16 12:44:20,107 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 21 treesize of output 20 [2022-11-16 12:44:20,162 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:44:20,162 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 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-16 12:44:20,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:20,172 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 13 treesize of output 7 [2022-11-16 12:44:20,254 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:44:20,254 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 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-16 12:44:20,351 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 12:44:20,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2022-11-16 12:44:20,468 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:44:20,468 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 11 treesize of output 11 [2022-11-16 12:44:20,508 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 34 treesize of output 30 [2022-11-16 12:44:20,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:20,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2022-11-16 12:44:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:44:20,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:20,571 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1074 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1074) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2022-11-16 12:44:20,581 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_37 Int) (v_ArrVal_1074 (Array Int Int))) (or (not (= (select |c_#valid| v_append_~node~0.base_37) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_37 v_ArrVal_1074) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)))) is different from false [2022-11-16 12:44:20,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:20,729 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-16 12:44:20,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:20,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:20,737 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 72 treesize of output 34 [2022-11-16 12:44:20,742 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 20 treesize of output 18 [2022-11-16 12:44:20,755 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:44:20,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 12:44:20,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:20,993 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 2 case distinctions, treesize of input 27 treesize of output 33 [2022-11-16 12:44:21,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:21,015 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 141 treesize of output 147 [2022-11-16 12:44:21,023 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 114 treesize of output 110 [2022-11-16 12:44:21,030 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 110 treesize of output 102 [2022-11-16 12:44:21,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:21,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 169 [2022-11-16 12:44:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 12:44:22,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178089160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:22,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:22,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 37 [2022-11-16 12:44:22,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750798220] [2022-11-16 12:44:22,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:22,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:44:22,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:44:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1026, Unknown=4, NotChecked=134, Total=1332 [2022-11-16 12:44:22,205 INFO L87 Difference]: Start difference. First operand 561 states and 776 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 31 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:44:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:24,537 INFO L93 Difference]: Finished difference Result 625 states and 696 transitions. [2022-11-16 12:44:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:44:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 31 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-11-16 12:44:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:24,540 INFO L225 Difference]: With dead ends: 625 [2022-11-16 12:44:24,540 INFO L226 Difference]: Without dead ends: 625 [2022-11-16 12:44:24,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=414, Invalid=2039, Unknown=5, NotChecked=194, Total=2652 [2022-11-16 12:44:24,542 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1194 mSDsluCounter, 2321 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1194 SdHoareTripleChecker+Valid, 2510 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1135 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:24,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1194 Valid, 2510 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2040 Invalid, 0 Unknown, 1135 Unchecked, 1.4s Time] [2022-11-16 12:44:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-16 12:44:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 479. [2022-11-16 12:44:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 329 states have (on average 1.7446808510638299) internal successors, (574), 447 states have internal predecessors, (574), 30 states have call successors, (30), 6 states have call predecessors, (30), 5 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-16 12:44:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 634 transitions. [2022-11-16 12:44:24,556 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 634 transitions. Word has length 39 [2022-11-16 12:44:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:24,556 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 634 transitions. [2022-11-16 12:44:24,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 31 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:44:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 634 transitions. [2022-11-16 12:44:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:44:24,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:24,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:24,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:24,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:44:24,771 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:44:24,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1807925701, now seen corresponding path program 1 times [2022-11-16 12:44:24,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:24,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360084671] [2022-11-16 12:44:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:24,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:25,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:44:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:25,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:44:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:44:25,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:44:25,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360084671] [2022-11-16 12:44:25,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360084671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:44:25,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256479171] [2022-11-16 12:44:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:25,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:25,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:44:25,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:44:25,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:44:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:44:26,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 12:44:26,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:44:26,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:44:26,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:44:26,496 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 13 treesize of output 9 [2022-11-16 12:44:26,506 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 13 treesize of output 9 [2022-11-16 12:44:26,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:44:26,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 20 [2022-11-16 12:44:26,669 INFO L321 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-16 12:44:26,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 24 [2022-11-16 12:44:26,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:44:26,734 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 28 treesize of output 28 [2022-11-16 12:44:26,901 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 28 treesize of output 28 [2022-11-16 12:44:26,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:44:26,949 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 28 treesize of output 28 [2022-11-16 12:44:26,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:44:27,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:27,015 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-16 12:44:27,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:27,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:27,028 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 19 treesize of output 10 [2022-11-16 12:44:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:44:27,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:44:27,141 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_1354 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1354) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_1355 (Array Int Int)) (v_ArrVal_1354 (Array Int Int))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1354) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1355) c_append_~head.base) .cse0)))))) is different from false [2022-11-16 12:44:31,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:31,653 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 110 treesize of output 111 [2022-11-16 12:44:31,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:31,666 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 182 treesize of output 154 [2022-11-16 12:44:31,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:31,680 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 136 treesize of output 117 [2022-11-16 12:44:31,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:31,697 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 494 treesize of output 491 [2022-11-16 12:44:31,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:31,730 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 760 treesize of output 676 [2022-11-16 12:44:31,754 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 647 treesize of output 583 [2022-11-16 12:44:31,769 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 596 treesize of output 536 [2022-11-16 12:44:31,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:31,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 543 treesize of output 561 [2022-11-16 12:44:31,827 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 523 treesize of output 519 [2022-11-16 12:44:32,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:32,863 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 24 treesize of output 25 [2022-11-16 12:44:32,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:32,873 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 40 treesize of output 39 [2022-11-16 12:44:32,879 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 13 treesize of output 9 [2022-11-16 12:44:32,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:32,945 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 48 treesize of output 49 [2022-11-16 12:44:32,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:32,954 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 38 treesize of output 39 [2022-11-16 12:44:32,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:32,968 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:32,969 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 36 treesize of output 35 [2022-11-16 12:44:32,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:32,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:44:32,984 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 27 treesize of output 26 [2022-11-16 12:44:40,006 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 47 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:44:40,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:44:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2022-11-16 12:44:40,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256479171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:44:40,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:44:40,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-11-16 12:44:40,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683726343] [2022-11-16 12:44:40,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:44:40,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:44:40,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:44:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:44:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=783, Unknown=1, NotChecked=56, Total=930 [2022-11-16 12:44:40,092 INFO L87 Difference]: Start difference. First operand 479 states and 634 transitions. Second operand has 31 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:44:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:44:43,426 INFO L93 Difference]: Finished difference Result 629 states and 698 transitions. [2022-11-16 12:44:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:44:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-11-16 12:44:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:44:43,430 INFO L225 Difference]: With dead ends: 629 [2022-11-16 12:44:43,430 INFO L226 Difference]: Without dead ends: 629 [2022-11-16 12:44:43,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 96 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=365, Invalid=1800, Unknown=1, NotChecked=90, Total=2256 [2022-11-16 12:44:43,431 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 1370 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 2449 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 4721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2182 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:44:43,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1371 Valid, 2487 Invalid, 4721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2449 Invalid, 0 Unknown, 2182 Unchecked, 1.8s Time] [2022-11-16 12:44:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-16 12:44:43,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 440. [2022-11-16 12:44:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 305 states have (on average 1.780327868852459) internal successors, (543), 421 states have internal predecessors, (543), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 12:44:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 575 transitions. [2022-11-16 12:44:43,443 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 575 transitions. Word has length 54 [2022-11-16 12:44:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:44:43,443 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 575 transitions. [2022-11-16 12:44:43,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:44:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 575 transitions. [2022-11-16 12:44:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-11-16 12:44:43,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:44:43,446 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:44:43,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:44:43,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:44:43,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 144 more)] === [2022-11-16 12:44:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:44:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash -943842599, now seen corresponding path program 1 times [2022-11-16 12:44:43,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:44:43,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507821054] [2022-11-16 12:44:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:44:43,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:44:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:05,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:45:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:06,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:45:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:07,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 12:45:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:07,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:45:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:08,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-11-16 12:45:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:09,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-11-16 12:45:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:09,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-16 12:45:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:10,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-16 12:45:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:10,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-16 12:45:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:11,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-11-16 12:45:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:11,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-11-16 12:45:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:12,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-11-16 12:45:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:13,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-11-16 12:45:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:14,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-11-16 12:45:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 58 proven. 458 refuted. 0 times theorem prover too weak. 836 trivial. 0 not checked. [2022-11-16 12:45:15,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:45:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507821054] [2022-11-16 12:45:15,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507821054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:45:15,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315467546] [2022-11-16 12:45:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:45:15,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:45:15,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:45:15,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:45:15,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9273fcf3-8e0a-4e7f-9f37-5e86a28f3b65/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:45:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:45:15,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 429 conjunts are in the unsatisfiable core [2022-11-16 12:45:15,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:15,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 12:45:16,209 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 [2022-11-16 12:45:16,284 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 21 treesize of output 20 [2022-11-16 12:45:16,356 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:45:16,356 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 23 treesize of output 27 [2022-11-16 12:45:16,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-16 12:45:16,444 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:45:16,444 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 28 treesize of output 32 [2022-11-16 12:45:16,540 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 12:45:16,540 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 15 treesize of output 15 [2022-11-16 12:45:17,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:17,548 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-11-16 12:45:17,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 153 [2022-11-16 12:45:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:17,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 115 [2022-11-16 12:45:17,575 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-11-16 12:45:17,576 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 17 treesize of output 17 [2022-11-16 12:45:17,604 INFO L321 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-11-16 12:45:17,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 41 [2022-11-16 12:45:18,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:18,770 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-11-16 12:45:18,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 150 [2022-11-16 12:45:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:18,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 116 [2022-11-16 12:45:18,820 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-11-16 12:45:18,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-11-16 12:45:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:19,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:19,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:19,851 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 12:45:19,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 353 treesize of output 339 [2022-11-16 12:45:19,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:19,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 344 treesize of output 228 [2022-11-16 12:45:19,916 INFO L321 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2022-11-16 12:45:19,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-11-16 12:45:21,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:21,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:21,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:21,396 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-16 12:45:21,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 652 treesize of output 554 [2022-11-16 12:45:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:21,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 551 treesize of output 353 [2022-11-16 12:45:21,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:45:21,481 INFO L321 Elim1Store]: treesize reduction 61, result has 35.8 percent of original size [2022-11-16 12:45:21,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2022-11-16 12:45:21,556 INFO L321 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2022-11-16 12:45:21,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 57 [2022-11-16 12:45:22,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:22,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:22,844 INFO L321 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2022-11-16 12:45:22,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 161 [2022-11-16 12:45:22,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:22,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 107 [2022-11-16 12:45:22,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:45:22,914 INFO L321 Elim1Store]: treesize reduction 91, result has 35.0 percent of original size [2022-11-16 12:45:22,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 72 [2022-11-16 12:45:22,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 31 [2022-11-16 12:45:24,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:24,064 INFO L321 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2022-11-16 12:45:24,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 141 treesize of output 175 [2022-11-16 12:45:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:24,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 115 [2022-11-16 12:45:24,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:45:24,155 INFO L321 Elim1Store]: treesize reduction 121, result has 34.6 percent of original size [2022-11-16 12:45:24,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 48 treesize of output 90 [2022-11-16 12:45:24,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 33 [2022-11-16 12:45:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:25,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:25,634 INFO L321 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2022-11-16 12:45:25,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 159 treesize of output 189 [2022-11-16 12:45:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:25,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 123 [2022-11-16 12:45:25,741 INFO L321 Elim1Store]: treesize reduction 167, result has 32.1 percent of original size [2022-11-16 12:45:25,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 108 [2022-11-16 12:45:27,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:27,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:27,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:27,214 INFO L321 Elim1Store]: treesize reduction 107, result has 24.1 percent of original size [2022-11-16 12:45:27,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 318 treesize of output 303 [2022-11-16 12:45:27,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:27,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 313 treesize of output 207 [2022-11-16 12:45:27,360 INFO L321 Elim1Store]: treesize reduction 167, result has 32.1 percent of original size [2022-11-16 12:45:27,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 108 [2022-11-16 12:45:27,435 INFO L321 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2022-11-16 12:45:27,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 13 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 55 [2022-11-16 12:45:28,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:28,716 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-11-16 12:45:28,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 185 treesize of output 217 [2022-11-16 12:45:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:28,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 153 [2022-11-16 12:45:28,893 INFO L321 Elim1Store]: treesize reduction 197, result has 32.3 percent of original size [2022-11-16 12:45:28,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 58 treesize of output 126 [2022-11-16 12:45:28,965 INFO L321 Elim1Store]: treesize reduction 25, result has 35.9 percent of original size [2022-11-16 12:45:28,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 55 [2022-11-16 12:45:30,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:30,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:30,371 INFO L321 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2022-11-16 12:45:30,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 231 [2022-11-16 12:45:30,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:30,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 161 [2022-11-16 12:45:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:45:30,582 INFO L321 Elim1Store]: treesize reduction 219, result has 33.2 percent of original size [2022-11-16 12:45:30,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 26 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 144 [2022-11-16 12:45:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:45:37,146 INFO L321 Elim1Store]: treesize reduction 177, result has 22.7 percent of original size [2022-11-16 12:45:37,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 821 treesize of output 748 [2022-11-16 12:45:38,333 INFO L321 Elim1Store]: treesize reduction 957, result has 18.8 percent of original size [2022-11-16 12:45:38,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 15 select indices, 15 select index equivalence classes, 3 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 116 case distinctions, treesize of input 581 treesize of output 765 [2022-11-16 12:46:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:19,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2211 treesize of output 1849 [2022-11-16 12:46:41,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:46:51,727 WARN L233 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 521 DAG size of output: 341 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 12:46:51,728 INFO L321 Elim1Store]: treesize reduction 1096, result has 38.9 percent of original size [2022-11-16 12:46:51,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 4764 treesize of output 4544 [2022-11-16 12:46:52,154 INFO L217 Elim1Store]: Index analysis took 163 ms [2022-11-16 12:51:48,063 WARN L233 SmtUtils]: Spent 4.93m on a formula simplification. DAG size of input: 12873 DAG size of output: 699 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 12:51:48,066 INFO L321 Elim1Store]: treesize reduction 24975, result has 5.0 percent of original size [2022-11-16 12:51:48,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 79 select indices, 79 select index equivalence classes, 3 disjoint index pairs (out of 3081 index pairs), introduced 79 new quantified variables, introduced 3158 case distinctions, treesize of input 3729 treesize of output 4877