./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a 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_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc --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 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 --- 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-5e519f3 [2022-11-02 20:36:24,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:36:24,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:36:24,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:36:24,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:36:24,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:36:24,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:36:24,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:36:24,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:36:24,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:36:24,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:36:24,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:36:24,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:36:24,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:36:24,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:36:24,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:36:24,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:36:24,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:36:24,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:36:24,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:36:24,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:36:24,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:36:24,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:36:24,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:36:24,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:36:24,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:36:24,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:36:24,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:36:24,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:36:24,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:36:24,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:36:24,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:36:24,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:36:24,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:36:24,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:36:24,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:36:24,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:36:24,970 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:36:24,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:36:24,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:36:24,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:36:24,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:36:25,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:36:25,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:36:25,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:36:25,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:36:25,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:36:25,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:36:25,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:36:25,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:36:25,023 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:36:25,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:36:25,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:36:25,025 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:36:25,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:36:25,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:36:25,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:36:25,026 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:36:25,026 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:36:25,026 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:36:25,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:36:25,027 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:36:25,027 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:36:25,027 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:36:25,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:36:25,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:36:25,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:36:25,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:25,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:36:25,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:36:25,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:36:25,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:36:25,030 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_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 [2022-11-02 20:36:25,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:36:25,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:36:25,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:36:25,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:36:25,482 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:36:25,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2022-11-02 20:36:25,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/data/485cf74ac/b17a7219c5fa41128d8072d4d021c2fe/FLAG23400c5b4 [2022-11-02 20:36:26,296 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:36:26,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2022-11-02 20:36:26,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/data/485cf74ac/b17a7219c5fa41128d8072d4d021c2fe/FLAG23400c5b4 [2022-11-02 20:36:26,567 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/data/485cf74ac/b17a7219c5fa41128d8072d4d021c2fe [2022-11-02 20:36:26,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:36:26,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:36:26,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:36:26,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:36:26,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:36:26,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:26" (1/1) ... [2022-11-02 20:36:26,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fc5cb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:26, skipping insertion in model container [2022-11-02 20:36:26,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:26" (1/1) ... [2022-11-02 20:36:26,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:36:26,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:36:27,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:36:27,014 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:36:27,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:36:27,129 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:36:27,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27 WrapperNode [2022-11-02 20:36:27,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:36:27,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:36:27,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:36:27,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:36:27,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,220 INFO L138 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 98 [2022-11-02 20:36:27,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:36:27,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:36:27,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:36:27,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:36:27,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,277 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:36:27,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:36:27,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:36:27,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:36:27,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (1/1) ... [2022-11-02 20:36:27,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:27,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:36:27,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:36:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:36:27,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:36:27,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:36:27,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:36:27,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:36:27,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:36:27,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:36:27,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:36:27,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:36:27,397 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-11-02 20:36:27,397 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-11-02 20:36:27,556 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:36:27,558 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:36:28,154 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:36:28,162 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:36:28,162 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:36:28,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:36:28 BoogieIcfgContainer [2022-11-02 20:36:28,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:36:28,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:36:28,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:36:28,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:36:28,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:36:26" (1/3) ... [2022-11-02 20:36:28,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ddcf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:36:28, skipping insertion in model container [2022-11-02 20:36:28,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:27" (2/3) ... [2022-11-02 20:36:28,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ddcf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:36:28, skipping insertion in model container [2022-11-02 20:36:28,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:36:28" (3/3) ... [2022-11-02 20:36:28,175 INFO L112 eAbstractionObserver]: Analyzing ICFG length_test03-1.i [2022-11-02 20:36:28,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:36:28,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-02 20:36:28,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:36:28,298 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;@702b5684, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:36:28,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2022-11-02 20:36:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 124 states have internal predecessors, (134), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-02 20:36:28,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:28,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-02 20:36:28,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:28,333 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-11-02 20:36:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:28,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400865571] [2022-11-02 20:36:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:28,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:28,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400865571] [2022-11-02 20:36:28,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400865571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:28,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:28,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754725948] [2022-11-02 20:36:28,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:28,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:28,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:28,708 INFO L87 Difference]: Start difference. First operand has 128 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 124 states have internal predecessors, (134), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-11-02 20:36:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:28,994 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2022-11-02 20:36:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:28,997 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 [2022-11-02 20:36:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:29,008 INFO L225 Difference]: With dead ends: 165 [2022-11-02 20:36:29,009 INFO L226 Difference]: Without dead ends: 163 [2022-11-02 20:36:29,011 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 [2022-11-02 20:36:29,015 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 53 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:29,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 170 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:36:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-02 20:36:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 124. [2022-11-02 20:36:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 64 states have (on average 1.96875) internal successors, (126), 120 states have internal predecessors, (126), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-11-02 20:36:29,115 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 3 [2022-11-02 20:36:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:29,115 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-11-02 20:36:29,115 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) [2022-11-02 20:36:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-11-02 20:36:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-02 20:36:29,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:29,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-02 20:36:29,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:36:29,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:29,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-11-02 20:36:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:29,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071987619] [2022-11-02 20:36:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:29,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:29,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:29,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071987619] [2022-11-02 20:36:29,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071987619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:29,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:29,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:29,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582938418] [2022-11-02 20:36:29,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:29,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:29,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:29,337 INFO L87 Difference]: Start difference. First operand 124 states and 130 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) [2022-11-02 20:36:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:29,529 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-11-02 20:36:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:29,530 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 [2022-11-02 20:36:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:29,532 INFO L225 Difference]: With dead ends: 124 [2022-11-02 20:36:29,533 INFO L226 Difference]: Without dead ends: 124 [2022-11-02 20:36:29,533 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 [2022-11-02 20:36:29,535 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:29,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 191 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-02 20:36:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-02 20:36:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 64 states have (on average 1.9375) internal successors, (124), 118 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2022-11-02 20:36:29,551 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 3 [2022-11-02 20:36:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:29,552 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2022-11-02 20:36:29,552 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) [2022-11-02 20:36:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2022-11-02 20:36:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:36:29,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:29,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:36:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:36:29,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:29,555 INFO L85 PathProgramCache]: Analyzing trace with hash 889446152, now seen corresponding path program 1 times [2022-11-02 20:36:29,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:29,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158743788] [2022-11-02 20:36:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:29,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:29,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158743788] [2022-11-02 20:36:29,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158743788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:29,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:29,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:29,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786329382] [2022-11-02 20:36:29,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:29,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:29,719 INFO L87 Difference]: Start difference. First operand 122 states and 128 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:29,886 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2022-11-02 20:36:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:36:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:29,894 INFO L225 Difference]: With dead ends: 139 [2022-11-02 20:36:29,894 INFO L226 Difference]: Without dead ends: 139 [2022-11-02 20:36:29,894 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 [2022-11-02 20:36:29,901 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 27 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:29,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 174 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-02 20:36:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2022-11-02 20:36:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 69 states have (on average 1.8840579710144927) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2022-11-02 20:36:29,913 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 6 [2022-11-02 20:36:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:29,914 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2022-11-02 20:36:29,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2022-11-02 20:36:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:36:29,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:29,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:36:29,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:36:29,924 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2022-11-02 20:36:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:29,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8394319] [2022-11-02 20:36:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:29,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8394319] [2022-11-02 20:36:30,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8394319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:30,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:30,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:30,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254526211] [2022-11-02 20:36:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:30,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:30,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:30,133 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:30,264 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2022-11-02 20:36:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:30,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:36:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:30,266 INFO L225 Difference]: With dead ends: 125 [2022-11-02 20:36:30,266 INFO L226 Difference]: Without dead ends: 125 [2022-11-02 20:36:30,266 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 [2022-11-02 20:36:30,278 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:30,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 191 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:30,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-02 20:36:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-02 20:36:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.855072463768116) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2022-11-02 20:36:30,293 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 6 [2022-11-02 20:36:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:30,298 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2022-11-02 20:36:30,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2022-11-02 20:36:30,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:36:30,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:30,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:30,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:36:30,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1036550317, now seen corresponding path program 1 times [2022-11-02 20:36:30,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:30,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666242398] [2022-11-02 20:36:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:30,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:30,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:30,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666242398] [2022-11-02 20:36:30,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666242398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:30,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:30,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:30,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734738598] [2022-11-02 20:36:30,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:30,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:30,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:30,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:30,551 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-02 20:36:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:30,670 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2022-11-02 20:36:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:30,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2022-11-02 20:36:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:30,672 INFO L225 Difference]: With dead ends: 118 [2022-11-02 20:36:30,673 INFO L226 Difference]: Without dead ends: 118 [2022-11-02 20:36:30,673 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 [2022-11-02 20:36:30,675 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 43 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:30,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 147 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-02 20:36:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-02 20:36:30,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 69 states have (on average 1.7826086956521738) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2022-11-02 20:36:30,697 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 12 [2022-11-02 20:36:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:30,698 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2022-11-02 20:36:30,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-02 20:36:30,698 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2022-11-02 20:36:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:36:30,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:30,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:30,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:36:30,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1036550316, now seen corresponding path program 1 times [2022-11-02 20:36:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:30,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235816386] [2022-11-02 20:36:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:30,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:30,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235816386] [2022-11-02 20:36:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235816386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:30,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:30,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:36:30,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088196118] [2022-11-02 20:36:30,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:30,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:30,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:30,874 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-02 20:36:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:30,969 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-11-02 20:36:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:30,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2022-11-02 20:36:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:30,972 INFO L225 Difference]: With dead ends: 113 [2022-11-02 20:36:30,972 INFO L226 Difference]: Without dead ends: 113 [2022-11-02 20:36:30,972 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 [2022-11-02 20:36:30,973 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 38 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:30,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 138 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-02 20:36:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-11-02 20:36:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.710144927536232) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2022-11-02 20:36:30,982 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 12 [2022-11-02 20:36:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:30,983 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2022-11-02 20:36:30,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-02 20:36:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2022-11-02 20:36:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:36:30,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:30,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:30,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:36:30,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2068288823, now seen corresponding path program 1 times [2022-11-02 20:36:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:30,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416661092] [2022-11-02 20:36:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:31,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:31,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416661092] [2022-11-02 20:36:31,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416661092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:31,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:31,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:36:31,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096896896] [2022-11-02 20:36:31,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:31,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:36:31,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:31,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:36:31,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:36:31,295 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-02 20:36:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:31,635 INFO L93 Difference]: Finished difference Result 223 states and 240 transitions. [2022-11-02 20:36:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:36:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 13 [2022-11-02 20:36:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:31,637 INFO L225 Difference]: With dead ends: 223 [2022-11-02 20:36:31,637 INFO L226 Difference]: Without dead ends: 223 [2022-11-02 20:36:31,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:36:31,639 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 296 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:31,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 209 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:36:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-02 20:36:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 147. [2022-11-02 20:36:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 108 states have (on average 1.6296296296296295) internal successors, (176), 142 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2022-11-02 20:36:31,648 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 13 [2022-11-02 20:36:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:31,648 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2022-11-02 20:36:31,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-02 20:36:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2022-11-02 20:36:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:36:31,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:31,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:31,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:36:31,650 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2068288824, now seen corresponding path program 1 times [2022-11-02 20:36:31,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930371606] [2022-11-02 20:36:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:32,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930371606] [2022-11-02 20:36:32,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930371606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:32,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:32,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:36:32,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793139535] [2022-11-02 20:36:32,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:32,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:36:32,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:36:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:36:32,045 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-02 20:36:32,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:32,266 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2022-11-02 20:36:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:36:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 13 [2022-11-02 20:36:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:32,268 INFO L225 Difference]: With dead ends: 173 [2022-11-02 20:36:32,269 INFO L226 Difference]: Without dead ends: 173 [2022-11-02 20:36:32,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:36:32,271 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 33 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:32,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 277 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:36:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-02 20:36:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-11-02 20:36:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 130 states have (on average 1.5538461538461539) internal successors, (202), 165 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:36:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 208 transitions. [2022-11-02 20:36:32,294 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 208 transitions. Word has length 13 [2022-11-02 20:36:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:32,294 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 208 transitions. [2022-11-02 20:36:32,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2022-11-02 20:36:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 208 transitions. [2022-11-02 20:36:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:36:32,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:32,307 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] [2022-11-02 20:36:32,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:36:32,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:32,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash -203399961, now seen corresponding path program 1 times [2022-11-02 20:36:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:32,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456802784] [2022-11-02 20:36:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:33,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:33,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456802784] [2022-11-02 20:36:33,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456802784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:33,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:33,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:36:33,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580730530] [2022-11-02 20:36:33,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:33,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:36:33,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:33,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:36:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:36:33,204 INFO L87 Difference]: Start difference. First operand 171 states and 208 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2022-11-02 20:36:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:33,559 INFO L93 Difference]: Finished difference Result 173 states and 207 transitions. [2022-11-02 20:36:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:36:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 [2022-11-02 20:36:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:33,561 INFO L225 Difference]: With dead ends: 173 [2022-11-02 20:36:33,561 INFO L226 Difference]: Without dead ends: 173 [2022-11-02 20:36:33,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:36:33,562 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 34 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:33,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 514 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:36:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-02 20:36:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-11-02 20:36:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 130 states have (on average 1.5461538461538462) internal successors, (201), 165 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:36:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 207 transitions. [2022-11-02 20:36:33,568 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 207 transitions. Word has length 22 [2022-11-02 20:36:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:33,569 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 207 transitions. [2022-11-02 20:36:33,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2022-11-02 20:36:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 207 transitions. [2022-11-02 20:36:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:36:33,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:33,570 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, 1, 1] [2022-11-02 20:36:33,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:36:33,571 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:33,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:33,571 INFO L85 PathProgramCache]: Analyzing trace with hash 167434122, now seen corresponding path program 1 times [2022-11-02 20:36:33,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:33,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967414630] [2022-11-02 20:36:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:33,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:34,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967414630] [2022-11-02 20:36:34,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967414630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:34,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:34,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:36:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306384973] [2022-11-02 20:36:34,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:36:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:36:34,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:36:34,422 INFO L87 Difference]: Start difference. First operand 171 states and 207 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-11-02 20:36:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:34,809 INFO L93 Difference]: Finished difference Result 163 states and 196 transitions. [2022-11-02 20:36:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:36:34,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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 24 [2022-11-02 20:36:34,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:34,811 INFO L225 Difference]: With dead ends: 163 [2022-11-02 20:36:34,811 INFO L226 Difference]: Without dead ends: 163 [2022-11-02 20:36:34,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:36:34,812 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 10 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:34,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 582 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:36:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-02 20:36:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-11-02 20:36:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 122 states have (on average 1.5573770491803278) internal successors, (190), 157 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:36:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 196 transitions. [2022-11-02 20:36:34,820 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 196 transitions. Word has length 24 [2022-11-02 20:36:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:34,820 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 196 transitions. [2022-11-02 20:36:34,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-11-02 20:36:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 196 transitions. [2022-11-02 20:36:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:36:34,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:34,822 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:34,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:36:34,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1239284085, now seen corresponding path program 1 times [2022-11-02 20:36:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:34,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631677984] [2022-11-02 20:36:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:34,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:34,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:34,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631677984] [2022-11-02 20:36:34,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631677984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:34,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:36:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764008601] [2022-11-02 20:36:34,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:36:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:36:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:36:34,956 INFO L87 Difference]: Start difference. First operand 163 states and 196 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:36:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:35,091 INFO L93 Difference]: Finished difference Result 155 states and 172 transitions. [2022-11-02 20:36:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:36:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-11-02 20:36:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:35,097 INFO L225 Difference]: With dead ends: 155 [2022-11-02 20:36:35,097 INFO L226 Difference]: Without dead ends: 155 [2022-11-02 20:36:35,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:36:35,098 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:35,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 247 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-02 20:36:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 142. [2022-11-02 20:36:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 101 states have (on average 1.504950495049505) internal successors, (152), 136 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:36:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2022-11-02 20:36:35,105 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 29 [2022-11-02 20:36:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:35,114 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2022-11-02 20:36:35,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:36:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2022-11-02 20:36:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:36:35,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:35,117 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] [2022-11-02 20:36:35,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:36:35,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1195581248, now seen corresponding path program 1 times [2022-11-02 20:36:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:35,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894251783] [2022-11-02 20:36:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:35,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:35,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894251783] [2022-11-02 20:36:35,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894251783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164803534] [2022-11-02 20:36:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:35,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:35,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:35,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:35,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:36:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:35,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:36:35,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:36,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:36:36,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-11-02 20:36:36,384 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:36:36,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:36,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:36,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:38,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 41 [2022-11-02 20:36:38,824 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:36:38,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 62 [2022-11-02 20:36:39,115 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:36:39,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 30 [2022-11-02 20:36:39,311 INFO L356 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-02 20:36:39,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 37 [2022-11-02 20:36:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:39,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164803534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:39,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:36:39,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-11-02 20:36:39,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748727768] [2022-11-02 20:36:39,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:39,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:36:39,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:36:39,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:36:39,361 INFO L87 Difference]: Start difference. First operand 142 states and 158 transitions. Second operand has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 16 states have internal predecessors, (66), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:36:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:39,936 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2022-11-02 20:36:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:36:39,937 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 16 states have internal predecessors, (66), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-11-02 20:36:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:39,939 INFO L225 Difference]: With dead ends: 179 [2022-11-02 20:36:39,939 INFO L226 Difference]: Without dead ends: 179 [2022-11-02 20:36:39,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:36:39,941 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 348 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:39,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 514 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 382 Invalid, 0 Unknown, 214 Unchecked, 0.4s Time] [2022-11-02 20:36:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-02 20:36:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2022-11-02 20:36:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 101 states have (on average 1.4158415841584158) internal successors, (143), 134 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:36:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2022-11-02 20:36:39,947 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 31 [2022-11-02 20:36:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:39,947 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2022-11-02 20:36:39,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 16 states have internal predecessors, (66), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:36:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2022-11-02 20:36:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:36:39,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:39,949 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:36:40,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:40,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:36:40,172 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:40,172 INFO L85 PathProgramCache]: Analyzing trace with hash 32633587, now seen corresponding path program 1 times [2022-11-02 20:36:40,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:40,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031905229] [2022-11-02 20:36:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:40,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:40,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:40,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:40,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031905229] [2022-11-02 20:36:40,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031905229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:40,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424659829] [2022-11-02 20:36:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:40,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:40,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:40,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:40,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:36:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:40,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:36:40,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:40,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:40,980 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:36:40,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:36:41,014 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 20:36:41,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-02 20:36:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:41,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:41,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424659829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:41,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:41,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2022-11-02 20:36:41,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775029008] [2022-11-02 20:36:41,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:41,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:36:41,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:36:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:36:41,126 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand has 11 states, 10 states have (on average 4.6) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:36:41,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:41,588 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2022-11-02 20:36:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:36:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-11-02 20:36:41,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:41,590 INFO L225 Difference]: With dead ends: 164 [2022-11-02 20:36:41,590 INFO L226 Difference]: Without dead ends: 164 [2022-11-02 20:36:41,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:36:41,591 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 156 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:41,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 406 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 371 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2022-11-02 20:36:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-02 20:36:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2022-11-02 20:36:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 103 states have (on average 1.4174757281553398) internal successors, (146), 135 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:36:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2022-11-02 20:36:41,596 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 32 [2022-11-02 20:36:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:41,597 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2022-11-02 20:36:41,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.6) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:36:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2022-11-02 20:36:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:36:41,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:41,598 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:36:41,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:41,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:36:41,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:41,802 INFO L85 PathProgramCache]: Analyzing trace with hash 32633588, now seen corresponding path program 1 times [2022-11-02 20:36:41,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:41,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660469982] [2022-11-02 20:36:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:41,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:42,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:42,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660469982] [2022-11-02 20:36:42,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660469982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295876012] [2022-11-02 20:36:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:42,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:42,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:42,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:36:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:42,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:36:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:42,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:43,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:36:43,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-02 20:36:43,077 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:36:43,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:36:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:36:43,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-02 20:36:43,189 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:36:43,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:43,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:43,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295876012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:43,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:43,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2022-11-02 20:36:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600796918] [2022-11-02 20:36:43,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:43,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:36:43,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:36:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:36:43,684 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 12 states have internal predecessors, (56), 3 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) [2022-11-02 20:36:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:44,296 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2022-11-02 20:36:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:36:44,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 12 states have internal predecessors, (56), 3 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 32 [2022-11-02 20:36:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:44,299 INFO L225 Difference]: With dead ends: 182 [2022-11-02 20:36:44,299 INFO L226 Difference]: Without dead ends: 182 [2022-11-02 20:36:44,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:36:44,301 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 67 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:44,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 557 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 412 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-11-02 20:36:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-02 20:36:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2022-11-02 20:36:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 112 states have (on average 1.3928571428571428) internal successors, (156), 145 states have internal predecessors, (156), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-02 20:36:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 168 transitions. [2022-11-02 20:36:44,313 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 168 transitions. Word has length 32 [2022-11-02 20:36:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:44,314 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 168 transitions. [2022-11-02 20:36:44,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 12 states have internal predecessors, (56), 3 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) [2022-11-02 20:36:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 168 transitions. [2022-11-02 20:36:44,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:36:44,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:44,318 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:36:44,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:36:44,546 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:44,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:44,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1524682805, now seen corresponding path program 1 times [2022-11-02 20:36:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:44,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909989982] [2022-11-02 20:36:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:44,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:44,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:45,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909989982] [2022-11-02 20:36:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909989982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:45,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972514135] [2022-11-02 20:36:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:45,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:45,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:45,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:45,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:36:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:45,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:36:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:45,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:45,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:36:45,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-11-02 20:36:45,643 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:36:45,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:36:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:36:45,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-11-02 20:36:45,746 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:36:45,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:45,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:46,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972514135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:46,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:46,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2022-11-02 20:36:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577603712] [2022-11-02 20:36:46,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:46,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:36:46,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:46,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:36:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:36:46,182 INFO L87 Difference]: Start difference. First operand 153 states and 168 transitions. Second operand has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 3 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) [2022-11-02 20:36:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:46,981 INFO L93 Difference]: Finished difference Result 199 states and 222 transitions. [2022-11-02 20:36:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:36:46,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 3 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 35 [2022-11-02 20:36:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:46,986 INFO L225 Difference]: With dead ends: 199 [2022-11-02 20:36:46,986 INFO L226 Difference]: Without dead ends: 199 [2022-11-02 20:36:46,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:36:46,996 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 58 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:46,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 722 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 491 Invalid, 0 Unknown, 84 Unchecked, 0.4s Time] [2022-11-02 20:36:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-02 20:36:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 156. [2022-11-02 20:36:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 115 states have (on average 1.391304347826087) internal successors, (160), 148 states have internal predecessors, (160), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-02 20:36:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2022-11-02 20:36:47,015 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 35 [2022-11-02 20:36:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:47,015 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2022-11-02 20:36:47,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 3 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) [2022-11-02 20:36:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2022-11-02 20:36:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:36:47,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:47,017 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] [2022-11-02 20:36:47,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:47,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:36:47,231 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash 20533246, now seen corresponding path program 1 times [2022-11-02 20:36:47,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:47,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830866736] [2022-11-02 20:36:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:47,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:47,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:47,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830866736] [2022-11-02 20:36:47,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830866736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:47,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110536781] [2022-11-02 20:36:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:47,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:47,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:47,883 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:47,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:36:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:36:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:48,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:48,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:36:48,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-02 20:36:48,401 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:36:48,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:36:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:36:48,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-02 20:36:48,482 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:36:48,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:48,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:48,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110536781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:48,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:48,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2022-11-02 20:36:48,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214792876] [2022-11-02 20:36:48,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:48,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:36:48,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:48,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:36:48,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:36:48,894 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 15 states have internal predecessors, (64), 3 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) [2022-11-02 20:36:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:49,864 INFO L93 Difference]: Finished difference Result 299 states and 324 transitions. [2022-11-02 20:36:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:36:49,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 15 states have internal predecessors, (64), 3 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 36 [2022-11-02 20:36:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:49,867 INFO L225 Difference]: With dead ends: 299 [2022-11-02 20:36:49,867 INFO L226 Difference]: Without dead ends: 299 [2022-11-02 20:36:49,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:36:49,868 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 335 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:49,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 908 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 666 Invalid, 0 Unknown, 133 Unchecked, 0.7s Time] [2022-11-02 20:36:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-02 20:36:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 195. [2022-11-02 20:36:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 151 states have (on average 1.4635761589403973) internal successors, (221), 185 states have internal predecessors, (221), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:36:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 241 transitions. [2022-11-02 20:36:49,881 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 241 transitions. Word has length 36 [2022-11-02 20:36:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:49,881 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 241 transitions. [2022-11-02 20:36:49,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 15 states have internal predecessors, (64), 3 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) [2022-11-02 20:36:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 241 transitions. [2022-11-02 20:36:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:36:49,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:49,883 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:36:49,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:50,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:50,099 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:50,100 INFO L85 PathProgramCache]: Analyzing trace with hash 636517819, now seen corresponding path program 1 times [2022-11-02 20:36:50,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:50,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316312109] [2022-11-02 20:36:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:50,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:50,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:36:50,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316312109] [2022-11-02 20:36:50,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316312109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:50,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772197130] [2022-11-02 20:36:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:50,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:50,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:50,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:50,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:36:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:50,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:36:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:36:50,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:50,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772197130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:50,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:36:50,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-02 20:36:50,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858332287] [2022-11-02 20:36:50,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:50,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:50,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:50,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:36:50,447 INFO L87 Difference]: Start difference. First operand 195 states and 241 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:36:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:50,457 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2022-11-02 20:36:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-02 20:36:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:50,460 INFO L225 Difference]: With dead ends: 197 [2022-11-02 20:36:50,460 INFO L226 Difference]: Without dead ends: 197 [2022-11-02 20:36:50,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:36:50,461 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:50,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 203 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:36:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-02 20:36:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-11-02 20:36:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 153 states have (on average 1.4509803921568627) internal successors, (222), 187 states have internal predecessors, (222), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:36:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 242 transitions. [2022-11-02 20:36:50,471 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 242 transitions. Word has length 37 [2022-11-02 20:36:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:50,471 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 242 transitions. [2022-11-02 20:36:50,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:36:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 242 transitions. [2022-11-02 20:36:50,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:36:50,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:50,473 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] [2022-11-02 20:36:50,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:50,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:36:50,694 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1748599685, now seen corresponding path program 1 times [2022-11-02 20:36:50,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:50,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485389039] [2022-11-02 20:36:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:50,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:50,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:50,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:50,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485389039] [2022-11-02 20:36:50,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485389039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:50,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590075829] [2022-11-02 20:36:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:50,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:50,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:50,877 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:50,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:36:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:36:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:36:51,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:51,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590075829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:51,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:36:51,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-11-02 20:36:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429081608] [2022-11-02 20:36:51,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:36:51,171 INFO L87 Difference]: Start difference. First operand 197 states and 242 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:36:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:51,252 INFO L93 Difference]: Finished difference Result 196 states and 241 transitions. [2022-11-02 20:36:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-11-02 20:36:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:51,254 INFO L225 Difference]: With dead ends: 196 [2022-11-02 20:36:51,254 INFO L226 Difference]: Without dead ends: 196 [2022-11-02 20:36:51,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:36:51,255 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 15 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:51,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-02 20:36:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2022-11-02 20:36:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 153 states have (on average 1.4313725490196079) internal successors, (219), 184 states have internal predecessors, (219), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:36:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 239 transitions. [2022-11-02 20:36:51,263 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 239 transitions. Word has length 38 [2022-11-02 20:36:51,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:51,263 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 239 transitions. [2022-11-02 20:36:51,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:36:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 239 transitions. [2022-11-02 20:36:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:36:51,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:51,265 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-11-02 20:36:51,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:51,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:36:51,490 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:51,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1429441119, now seen corresponding path program 1 times [2022-11-02 20:36:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:51,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838730632] [2022-11-02 20:36:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:51,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:52,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:53,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838730632] [2022-11-02 20:36:53,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838730632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889415334] [2022-11-02 20:36:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:53,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:53,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:53,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:53,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:36:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:53,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 20:36:53,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:53,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:53,361 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:36:53,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:36:53,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:53,745 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:36:53,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:53,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:53,892 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:36:53,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:53,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-02 20:36:54,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:36:54,104 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-02 20:36:54,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:54,371 INFO L356 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-02 20:36:54,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:54,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:54,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:54,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:36:54,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2022-11-02 20:36:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:54,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:54,907 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1785 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1785) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2022-11-02 20:36:55,213 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:36:55,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:55,231 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:36:55,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:55,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 182 treesize of output 166 [2022-11-02 20:36:55,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 79 [2022-11-02 20:36:55,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889415334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:55,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:55,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2022-11-02 20:36:55,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289507642] [2022-11-02 20:36:55,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:55,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:36:55,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:36:55,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=891, Unknown=3, NotChecked=60, Total=1056 [2022-11-02 20:36:55,624 INFO L87 Difference]: Start difference. First operand 194 states and 239 transitions. Second operand has 28 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-11-02 20:36:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:56,718 INFO L93 Difference]: Finished difference Result 216 states and 263 transitions. [2022-11-02 20:36:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:36:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 24 states have internal predecessors, (73), 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 40 [2022-11-02 20:36:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:56,720 INFO L225 Difference]: With dead ends: 216 [2022-11-02 20:36:56,720 INFO L226 Difference]: Without dead ends: 216 [2022-11-02 20:36:56,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=169, Invalid=1314, Unknown=3, NotChecked=74, Total=1560 [2022-11-02 20:36:56,722 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 83 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:56,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1091 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 556 Invalid, 0 Unknown, 199 Unchecked, 0.5s Time] [2022-11-02 20:36:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-02 20:36:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-11-02 20:36:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 172 states have (on average 1.4011627906976745) internal successors, (241), 203 states have internal predecessors, (241), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:36:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 261 transitions. [2022-11-02 20:36:56,732 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 261 transitions. Word has length 40 [2022-11-02 20:36:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:56,732 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 261 transitions. [2022-11-02 20:36:56,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-11-02 20:36:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 261 transitions. [2022-11-02 20:36:56,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:36:56,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:56,735 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-11-02 20:36:56,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:56,953 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:36:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1429441120, now seen corresponding path program 1 times [2022-11-02 20:36:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814885000] [2022-11-02 20:36:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:58,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:36:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:59,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:59,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814885000] [2022-11-02 20:36:59,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814885000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:36:59,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279686929] [2022-11-02 20:36:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:59,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:59,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:59,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:36:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:59,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-02 20:36:59,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:59,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:36:59,813 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:36:59,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:37:00,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:00,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:00,297 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:37:00,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:00,320 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:37:00,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:00,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:00,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:00,525 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:37:00,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:00,549 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:37:00,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:00,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-02 20:37:00,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-02 20:37:00,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:00,923 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-02 20:37:00,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:01,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,254 INFO L356 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-02 20:37:01,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:01,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:01,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:01,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:02,020 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_2002 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2002) c_append_~head.base) .cse0) 5))) (forall ((v_ArrVal_2003 (Array Int Int)) (v_ArrVal_2002 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2002) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2003) c_append_~head.base) .cse0)))))) is different from false [2022-11-02 20:37:03,394 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:03,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:03,414 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:03,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:03,436 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:03,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:03,462 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:03,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 982 treesize of output 924 [2022-11-02 20:37:03,535 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:03,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1584 treesize of output 1494 [2022-11-02 20:37:03,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1456 treesize of output 1380 [2022-11-02 20:37:03,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1351 treesize of output 1223 [2022-11-02 20:37:03,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1223 treesize of output 1155 [2022-11-02 20:37:03,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1192 treesize of output 1052 [2022-11-02 20:37:03,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1027 treesize of output 1019 [2022-11-02 20:37:09,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279686929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:09,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:09,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2022-11-02 20:37:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670507424] [2022-11-02 20:37:09,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:37:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:37:09,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=958, Unknown=3, NotChecked=62, Total=1122 [2022-11-02 20:37:09,417 INFO L87 Difference]: Start difference. First operand 214 states and 261 transitions. Second operand has 28 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-11-02 20:37:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:11,088 INFO L93 Difference]: Finished difference Result 227 states and 274 transitions. [2022-11-02 20:37:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:37:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 24 states have internal predecessors, (73), 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 40 [2022-11-02 20:37:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:11,091 INFO L225 Difference]: With dead ends: 227 [2022-11-02 20:37:11,091 INFO L226 Difference]: Without dead ends: 227 [2022-11-02 20:37:11,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=194, Invalid=1699, Unknown=3, NotChecked=84, Total=1980 [2022-11-02 20:37:11,092 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 94 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:11,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1217 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 572 Invalid, 0 Unknown, 448 Unchecked, 0.6s Time] [2022-11-02 20:37:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-02 20:37:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2022-11-02 20:37:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 181 states have (on average 1.3867403314917126) internal successors, (251), 212 states have internal predecessors, (251), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 20:37:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 271 transitions. [2022-11-02 20:37:11,101 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 271 transitions. Word has length 40 [2022-11-02 20:37:11,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:11,102 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 271 transitions. [2022-11-02 20:37:11,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 24 states have internal predecessors, (73), 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) [2022-11-02 20:37:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 271 transitions. [2022-11-02 20:37:11,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:37:11,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:11,103 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, 1, 1, 1, 1] [2022-11-02 20:37:11,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:11,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:11,318 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:37:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1618850475, now seen corresponding path program 1 times [2022-11-02 20:37:11,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:11,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367978003] [2022-11-02 20:37:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:12,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:37:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:15,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:15,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367978003] [2022-11-02 20:37:15,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367978003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:15,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523845356] [2022-11-02 20:37:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:15,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:15,254 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:15,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:37:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:15,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-02 20:37:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:15,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:15,526 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:37:15,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:37:15,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:15,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2022-11-02 20:37:15,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:15,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2022-11-02 20:37:16,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:16,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:16,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:37:16,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:16,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:37:16,469 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-02 20:37:16,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 33 [2022-11-02 20:37:18,922 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-02 20:37:18,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-02 20:37:19,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-11-02 20:37:19,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-11-02 20:37:19,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-02 20:37:19,089 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:19,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 10 [2022-11-02 20:37:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:19,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:19,125 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2232 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_2232) c_append_~head.base) c_append_~head.offset) 0)) (forall ((v_ArrVal_2231 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2231) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2022-11-02 20:37:25,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523845356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:25,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:25,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-11-02 20:37:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095719467] [2022-11-02 20:37:25,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:25,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:37:25,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:37:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=978, Unknown=17, NotChecked=64, Total=1190 [2022-11-02 20:37:25,492 INFO L87 Difference]: Start difference. First operand 223 states and 271 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 27 states have internal predecessors, (65), 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) [2022-11-02 20:37:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:26,406 INFO L93 Difference]: Finished difference Result 277 states and 341 transitions. [2022-11-02 20:37:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:37:26,414 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 27 states have internal predecessors, (65), 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 41 [2022-11-02 20:37:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:26,416 INFO L225 Difference]: With dead ends: 277 [2022-11-02 20:37:26,416 INFO L226 Difference]: Without dead ends: 277 [2022-11-02 20:37:26,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=135, Invalid=1042, Unknown=17, NotChecked=66, Total=1260 [2022-11-02 20:37:26,418 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 51 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:26,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1077 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 531 Invalid, 0 Unknown, 238 Unchecked, 0.9s Time] [2022-11-02 20:37:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-02 20:37:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 233. [2022-11-02 20:37:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 190 states have (on average 1.3736842105263158) internal successors, (261), 220 states have internal predecessors, (261), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:37:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 284 transitions. [2022-11-02 20:37:26,427 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 284 transitions. Word has length 41 [2022-11-02 20:37:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:26,427 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 284 transitions. [2022-11-02 20:37:26,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 27 states have internal predecessors, (65), 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) [2022-11-02 20:37:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 284 transitions. [2022-11-02 20:37:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:37:26,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:26,429 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-11-02 20:37:26,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:26,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-02 20:37:26,646 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:37:26,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:26,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1664648962, now seen corresponding path program 1 times [2022-11-02 20:37:26,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:26,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375684479] [2022-11-02 20:37:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:27,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:37:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:27,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:27,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375684479] [2022-11-02 20:37:27,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375684479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:27,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282366779] [2022-11-02 20:37:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:27,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:27,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:27,711 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:27,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:37:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-02 20:37:28,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:28,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,065 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:37:28,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:37:28,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,437 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:37:28,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,447 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:28,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,523 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:37:28,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,649 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:37:28,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,804 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:37:28,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,920 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:28,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:28,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:28,941 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2456 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2456) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2022-11-02 20:37:28,953 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2456 (Array Int Int)) (v_append_~node~0.base_55 Int)) (or (not (= 0 (select |c_#valid| v_append_~node~0.base_55))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_55 v_ArrVal_2456) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)))) is different from false [2022-11-02 20:37:28,964 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2456 (Array Int Int)) (v_append_~node~0.base_55 Int)) (or (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_55 v_ArrVal_2456) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|))) (not (= 0 (select |c_#valid| v_append_~node~0.base_55))))) is different from false [2022-11-02 20:37:29,099 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:29,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:29,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:37:29,108 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:29,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:29,116 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:37:29,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 [2022-11-02 20:37:29,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:29,443 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:29,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:29,470 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:29,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:29,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:29,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:29,963 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:37:29,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 56 treesize of output 96 [2022-11-02 20:37:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-02 20:37:30,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282366779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:30,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:37:30,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 38 [2022-11-02 20:37:30,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249110774] [2022-11-02 20:37:30,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:30,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 20:37:30,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 20:37:30,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1037, Unknown=8, NotChecked=204, Total=1406 [2022-11-02 20:37:30,334 INFO L87 Difference]: Start difference. First operand 233 states and 284 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 32 states have internal predecessors, (92), 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) [2022-11-02 20:37:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:32,257 INFO L93 Difference]: Finished difference Result 242 states and 291 transitions. [2022-11-02 20:37:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:37:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 32 states have internal predecessors, (92), 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 42 [2022-11-02 20:37:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:32,260 INFO L225 Difference]: With dead ends: 242 [2022-11-02 20:37:32,261 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:37:32,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 67 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=385, Invalid=1859, Unknown=24, NotChecked=282, Total=2550 [2022-11-02 20:37:32,262 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 292 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:32,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 943 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 749 Invalid, 0 Unknown, 557 Unchecked, 0.7s Time] [2022-11-02 20:37:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:37:32,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 198. [2022-11-02 20:37:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 158 states have (on average 1.3987341772151898) internal successors, (221), 188 states have internal predecessors, (221), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-02 20:37:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 236 transitions. [2022-11-02 20:37:32,270 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 236 transitions. Word has length 42 [2022-11-02 20:37:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:32,271 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 236 transitions. [2022-11-02 20:37:32,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 32 states have internal predecessors, (92), 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) [2022-11-02 20:37:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 236 transitions. [2022-11-02 20:37:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:37:32,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:32,272 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, 1, 1, 1, 1] [2022-11-02 20:37:32,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:32,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:32,486 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:37:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:32,487 INFO L85 PathProgramCache]: Analyzing trace with hash -996553650, now seen corresponding path program 1 times [2022-11-02 20:37:32,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:32,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142004996] [2022-11-02 20:37:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:32,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:33,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:37:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:37,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:37,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142004996] [2022-11-02 20:37:37,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142004996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:37,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690215316] [2022-11-02 20:37:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:37,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:37,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:37,008 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:37,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:37:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-02 20:37:37,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:37,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:37,344 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:37:37,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:37:37,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-02 20:37:37,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-11-02 20:37:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:38,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:38,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2022-11-02 20:37:38,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:38,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 23 [2022-11-02 20:37:38,163 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-02 20:37:38,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 33 [2022-11-02 20:37:42,568 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-02 20:37:42,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-02 20:37:42,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-11-02 20:37:42,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-11-02 20:37:42,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:37:42,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:37:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:42,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:54,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690215316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:54,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:54,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-11-02 20:37:54,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467881728] [2022-11-02 20:37:54,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:54,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:37:54,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:54,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:37:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1392, Unknown=18, NotChecked=0, Total=1560 [2022-11-02 20:37:54,844 INFO L87 Difference]: Start difference. First operand 198 states and 236 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 30 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) [2022-11-02 20:37:56,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:56,064 INFO L93 Difference]: Finished difference Result 239 states and 286 transitions. [2022-11-02 20:37:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:37:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 30 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 43 [2022-11-02 20:37:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:56,066 INFO L225 Difference]: With dead ends: 239 [2022-11-02 20:37:56,066 INFO L226 Difference]: Without dead ends: 239 [2022-11-02 20:37:56,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=186, Invalid=1776, Unknown=18, NotChecked=0, Total=1980 [2022-11-02 20:37:56,068 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 72 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:56,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1087 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 511 Invalid, 0 Unknown, 239 Unchecked, 0.9s Time] [2022-11-02 20:37:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-02 20:37:56,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 198. [2022-11-02 20:37:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 158 states have (on average 1.3924050632911393) internal successors, (220), 188 states have internal predecessors, (220), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-02 20:37:56,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 234 transitions. [2022-11-02 20:37:56,075 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 234 transitions. Word has length 43 [2022-11-02 20:37:56,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:56,076 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 234 transitions. [2022-11-02 20:37:56,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 30 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) [2022-11-02 20:37:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 234 transitions. [2022-11-02 20:37:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:37:56,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:56,077 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:56,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:56,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:56,302 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:37:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1373746222, now seen corresponding path program 1 times [2022-11-02 20:37:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:56,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906202766] [2022-11-02 20:37:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:37:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:37:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:37:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:56,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906202766] [2022-11-02 20:37:56,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906202766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:56,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728087540] [2022-11-02 20:37:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:56,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:56,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:56,469 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:56,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:37:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:56,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:37:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:37:56,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:37:56,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728087540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:56,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:37:56,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-02 20:37:56,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564715967] [2022-11-02 20:37:56,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:56,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:37:56,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:37:56,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:37:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:37:56,859 INFO L87 Difference]: Start difference. First operand 198 states and 234 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:37:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:57,039 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2022-11-02 20:37:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:37:57,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-11-02 20:37:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:57,042 INFO L225 Difference]: With dead ends: 272 [2022-11-02 20:37:57,042 INFO L226 Difference]: Without dead ends: 272 [2022-11-02 20:37:57,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:37:57,043 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 61 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:57,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 429 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:37:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-02 20:37:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 257. [2022-11-02 20:37:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 212 states have (on average 1.4339622641509433) internal successors, (304), 241 states have internal predecessors, (304), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (18), 10 states have call predecessors, (18), 11 states have call successors, (18) [2022-11-02 20:37:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 333 transitions. [2022-11-02 20:37:57,053 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 333 transitions. Word has length 46 [2022-11-02 20:37:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:57,054 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 333 transitions. [2022-11-02 20:37:57,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:37:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 333 transitions. [2022-11-02 20:37:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:37:57,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:57,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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] [2022-11-02 20:37:57,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:37:57,298 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:37:57,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:57,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1475627180, now seen corresponding path program 1 times [2022-11-02 20:37:57,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:37:57,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258721831] [2022-11-02 20:37:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:37:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:57,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:37:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:57,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:37:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:37:57,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:37:57,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258721831] [2022-11-02 20:37:57,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258721831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:37:57,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12886636] [2022-11-02 20:37:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:57,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:37:57,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:37:57,954 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:37:57,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:37:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:37:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:58,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:37:58,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-11-02 20:37:58,507 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:37:58,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:37:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:37:58,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:38:04,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 41 [2022-11-02 20:38:04,850 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:04,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 62 [2022-11-02 20:38:05,022 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:05,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 30 [2022-11-02 20:38:05,164 INFO L356 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-02 20:38:05,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 37 [2022-11-02 20:38:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:38:05,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12886636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:38:05,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:38:05,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-11-02 20:38:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311634280] [2022-11-02 20:38:05,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:38:05,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:38:05,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:38:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:38:05,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:38:05,225 INFO L87 Difference]: Start difference. First operand 257 states and 333 transitions. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 16 states have internal predecessors, (82), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:38:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:05,928 INFO L93 Difference]: Finished difference Result 329 states and 410 transitions. [2022-11-02 20:38:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:38:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 16 states have internal predecessors, (82), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2022-11-02 20:38:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:38:05,930 INFO L225 Difference]: With dead ends: 329 [2022-11-02 20:38:05,931 INFO L226 Difference]: Without dead ends: 329 [2022-11-02 20:38:05,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:38:05,932 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 434 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:38:05,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 613 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 549 Invalid, 0 Unknown, 216 Unchecked, 0.5s Time] [2022-11-02 20:38:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-02 20:38:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 219. [2022-11-02 20:38:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 178 states have (on average 1.3146067415730338) internal successors, (234), 206 states have internal predecessors, (234), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:38:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 250 transitions. [2022-11-02 20:38:05,942 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 250 transitions. Word has length 49 [2022-11-02 20:38:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:38:05,943 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 250 transitions. [2022-11-02 20:38:05,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 16 states have internal predecessors, (82), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:38:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 250 transitions. [2022-11-02 20:38:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:38:05,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:05,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:05,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:38:06,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:38:06,158 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:38:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2022121576, now seen corresponding path program 1 times [2022-11-02 20:38:06,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:06,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579810224] [2022-11-02 20:38:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:06,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:06,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:38:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:07,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:38:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:38:07,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:38:07,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579810224] [2022-11-02 20:38:07,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579810224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:38:07,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853321518] [2022-11-02 20:38:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:07,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:38:07,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:38:07,148 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:38:07,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:38:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:38:07,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:38:07,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:07,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:38:07,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-02 20:38:07,703 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:38:07,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:38:08,025 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-02 20:38:08,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 33 [2022-11-02 20:38:08,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:38:08,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:38:08,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-02 20:38:08,189 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-02 20:38:08,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-11-02 20:38:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:38:08,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:38:16,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853321518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:38:16,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:38:16,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2022-11-02 20:38:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307833452] [2022-11-02 20:38:16,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:38:16,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:38:16,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:38:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:38:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:38:16,685 INFO L87 Difference]: Start difference. First operand 219 states and 250 transitions. Second operand has 21 states, 20 states have (on average 4.55) internal successors, (91), 17 states have internal predecessors, (91), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:38:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:17,285 INFO L93 Difference]: Finished difference Result 246 states and 277 transitions. [2022-11-02 20:38:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:38:17,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.55) internal successors, (91), 17 states have internal predecessors, (91), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-11-02 20:38:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:38:17,291 INFO L225 Difference]: With dead ends: 246 [2022-11-02 20:38:17,291 INFO L226 Difference]: Without dead ends: 246 [2022-11-02 20:38:17,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:38:17,293 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 127 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:38:17,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 565 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 373 Invalid, 0 Unknown, 107 Unchecked, 0.4s Time] [2022-11-02 20:38:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-02 20:38:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 215. [2022-11-02 20:38:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 177 states have (on average 1.2994350282485876) internal successors, (230), 202 states have internal predecessors, (230), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:38:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 246 transitions. [2022-11-02 20:38:17,312 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 246 transitions. Word has length 52 [2022-11-02 20:38:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:38:17,313 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 246 transitions. [2022-11-02 20:38:17,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.55) internal successors, (91), 17 states have internal predecessors, (91), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:38:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 246 transitions. [2022-11-02 20:38:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:38:17,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:17,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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] [2022-11-02 20:38:17,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:38:17,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:38:17,528 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:38:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:17,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1542173709, now seen corresponding path program 1 times [2022-11-02 20:38:17,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:17,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501633877] [2022-11-02 20:38:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:17,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:18,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:38:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:18,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:38:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:38:19,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:38:19,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501633877] [2022-11-02 20:38:19,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501633877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:38:19,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438086605] [2022-11-02 20:38:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:19,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:38:19,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:38:19,259 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:38:19,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:38:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:19,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-02 20:38:19,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:38:19,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:19,825 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:38:19,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:38:20,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:20,189 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:38:20,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:20,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:20,330 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:38:20,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:20,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-02 20:38:20,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:38:20,534 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-02 20:38:20,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:20,764 INFO L356 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-02 20:38:20,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:20,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:21,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:21,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:21,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:38:21,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2022-11-02 20:38:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:38:21,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:38:21,661 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:21,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:21,675 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:21,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 170 treesize of output 118 [2022-11-02 20:38:21,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 86 treesize of output 78 [2022-11-02 20:38:21,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 36 [2022-11-02 20:38:22,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438086605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:38:22,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:38:22,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 31 [2022-11-02 20:38:22,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090755766] [2022-11-02 20:38:22,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:38:22,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:38:22,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:38:22,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:38:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1181, Unknown=16, NotChecked=0, Total=1332 [2022-11-02 20:38:22,095 INFO L87 Difference]: Start difference. First operand 215 states and 246 transitions. Second operand has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 28 states have internal predecessors, (105), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:38:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:23,256 INFO L93 Difference]: Finished difference Result 256 states and 295 transitions. [2022-11-02 20:38:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:38:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 28 states have internal predecessors, (105), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-11-02 20:38:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:38:23,260 INFO L225 Difference]: With dead ends: 256 [2022-11-02 20:38:23,261 INFO L226 Difference]: Without dead ends: 256 [2022-11-02 20:38:23,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=260, Invalid=1886, Unknown=16, NotChecked=0, Total=2162 [2022-11-02 20:38:23,262 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 95 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:38:23,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1217 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 343 Invalid, 0 Unknown, 359 Unchecked, 0.4s Time] [2022-11-02 20:38:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-02 20:38:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2022-11-02 20:38:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 209 states have (on average 1.2727272727272727) internal successors, (266), 235 states have internal predecessors, (266), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-02 20:38:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 292 transitions. [2022-11-02 20:38:23,273 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 292 transitions. Word has length 58 [2022-11-02 20:38:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:38:23,273 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 292 transitions. [2022-11-02 20:38:23,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 28 states have internal predecessors, (105), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:38:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 292 transitions. [2022-11-02 20:38:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:38:23,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:23,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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] [2022-11-02 20:38:23,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:38:23,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:38:23,490 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:38:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:23,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1542173708, now seen corresponding path program 1 times [2022-11-02 20:38:23,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:38:23,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724780406] [2022-11-02 20:38:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:23,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:38:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:24,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:38:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:24,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:38:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:38:25,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:38:25,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724780406] [2022-11-02 20:38:25,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724780406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:38:25,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72430122] [2022-11-02 20:38:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:25,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:38:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:38:25,714 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:38:25,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:38:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:26,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-02 20:38:26,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:38:26,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:26,359 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:38:26,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:38:26,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:26,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:26,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:26,840 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:38:26,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:26,860 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:38:26,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:26,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:26,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,039 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:38:27,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,061 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:38:27,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-02 20:38:27,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-02 20:38:27,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:38:27,305 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-02 20:38:27,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:38:27,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2022-11-02 20:38:27,531 INFO L356 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-02 20:38:27,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:38:27,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:38:27,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2022-11-02 20:38:27,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:38:27,962 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:27,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 16 [2022-11-02 20:38:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:38:27,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:38:28,055 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_4100 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_4100) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_4099 (Array Int Int)) (v_ArrVal_4100 (Array Int Int))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_4100) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_4099) c_append_~head.base) .cse0)))))) is different from false [2022-11-02 20:38:28,624 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:28,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 105 treesize of output 106 [2022-11-02 20:38:28,647 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:28,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 623 treesize of output 445 [2022-11-02 20:38:28,663 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:28,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 421 treesize of output 342 [2022-11-02 20:38:28,688 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:28,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1064 treesize of output 1012 [2022-11-02 20:38:28,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:38:28,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4583 treesize of output 4400 [2022-11-02 20:38:28,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4388 treesize of output 3932 [2022-11-02 20:38:28,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3911 treesize of output 3527 [2022-11-02 20:38:28,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3527 treesize of output 3331 [2022-11-02 20:38:28,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3356 treesize of output 2964 [2022-11-02 20:38:29,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2947 treesize of output 2939 [2022-11-02 20:39:01,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72430122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:01,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:01,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-11-02 20:39:01,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613423745] [2022-11-02 20:39:01,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:01,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:39:01,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:39:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1134, Unknown=3, NotChecked=68, Total=1332 [2022-11-02 20:39:01,324 INFO L87 Difference]: Start difference. First operand 253 states and 292 transitions. Second operand has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 27 states have internal predecessors, (104), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:39:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:03,621 INFO L93 Difference]: Finished difference Result 287 states and 338 transitions. [2022-11-02 20:39:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:39:03,622 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 27 states have internal predecessors, (104), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-11-02 20:39:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:03,624 INFO L225 Difference]: With dead ends: 287 [2022-11-02 20:39:03,624 INFO L226 Difference]: Without dead ends: 287 [2022-11-02 20:39:03,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=338, Invalid=2419, Unknown=3, NotChecked=102, Total=2862 [2022-11-02 20:39:03,626 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 140 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:03,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 936 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 384 Invalid, 0 Unknown, 259 Unchecked, 0.4s Time] [2022-11-02 20:39:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-02 20:39:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 279. [2022-11-02 20:39:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 233 states have (on average 1.257510729613734) internal successors, (293), 257 states have internal predecessors, (293), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-02 20:39:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 323 transitions. [2022-11-02 20:39:03,646 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 323 transitions. Word has length 58 [2022-11-02 20:39:03,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:03,646 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 323 transitions. [2022-11-02 20:39:03,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 27 states have internal predecessors, (104), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:39:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 323 transitions. [2022-11-02 20:39:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:39:03,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:03,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-02 20:39:03,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:03,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:39:03,879 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:39:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:03,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2096051095, now seen corresponding path program 1 times [2022-11-02 20:39:03,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:03,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481023868] [2022-11-02 20:39:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:39:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:39:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:05,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:05,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481023868] [2022-11-02 20:39:05,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481023868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:05,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857299432] [2022-11-02 20:39:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:05,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:05,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:05,119 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:05,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:39:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-02 20:39:05,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:05,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:05,795 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:39:05,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:39:05,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,119 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:39:06,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,208 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:39:06,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,317 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:39:06,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,454 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:39:06,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 32 [2022-11-02 20:39:06,556 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:06,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:06,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:06,575 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4413 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_4413) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2022-11-02 20:39:06,585 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_93 Int) (v_ArrVal_4413 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_93 v_ArrVal_4413) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_93) 0)))) is different from false [2022-11-02 20:39:06,596 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_93 Int) (v_ArrVal_4413 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_93 v_ArrVal_4413) |c_ULTIMATE.start_main_~list2~0#1.base|) |c_ULTIMATE.start_main_~list2~0#1.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_93) 0)))) is different from false [2022-11-02 20:39:06,717 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:06,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:06,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:39:06,727 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:06,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 34 [2022-11-02 20:39:06,737 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:39:06,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 [2022-11-02 20:39:06,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:07,051 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:07,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:07,100 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:07,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 75 treesize of output 85 [2022-11-02 20:39:07,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 50 [2022-11-02 20:39:07,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 46 [2022-11-02 20:39:07,549 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:07,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 56 treesize of output 96 [2022-11-02 20:39:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-02 20:39:08,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857299432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:08,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:08,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 43 [2022-11-02 20:39:08,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421653771] [2022-11-02 20:39:08,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:08,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:39:08,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:08,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:39:08,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1381, Unknown=8, NotChecked=234, Total=1806 [2022-11-02 20:39:08,261 INFO L87 Difference]: Start difference. First operand 279 states and 323 transitions. Second operand has 43 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 37 states have internal predecessors, (136), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:39:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:10,743 INFO L93 Difference]: Finished difference Result 397 states and 435 transitions. [2022-11-02 20:39:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:39:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 37 states have internal predecessors, (136), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 60 [2022-11-02 20:39:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:10,747 INFO L225 Difference]: With dead ends: 397 [2022-11-02 20:39:10,747 INFO L226 Difference]: Without dead ends: 397 [2022-11-02 20:39:10,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=632, Invalid=3121, Unknown=41, NotChecked=366, Total=4160 [2022-11-02 20:39:10,749 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 512 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:10,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 1022 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 945 Invalid, 0 Unknown, 674 Unchecked, 0.9s Time] [2022-11-02 20:39:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-02 20:39:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 281. [2022-11-02 20:39:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 235 states have (on average 1.2425531914893617) internal successors, (292), 258 states have internal predecessors, (292), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-02 20:39:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 322 transitions. [2022-11-02 20:39:10,761 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 322 transitions. Word has length 60 [2022-11-02 20:39:10,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:10,762 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 322 transitions. [2022-11-02 20:39:10,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.1627906976744184) internal successors, (136), 37 states have internal predecessors, (136), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:39:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 322 transitions. [2022-11-02 20:39:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:39:10,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:10,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-11-02 20:39:10,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:10,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:10,990 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:39:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash 115708675, now seen corresponding path program 1 times [2022-11-02 20:39:10,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:10,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789466686] [2022-11-02 20:39:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:39:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:11,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:39:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:39:12,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:12,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789466686] [2022-11-02 20:39:12,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789466686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:12,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909603195] [2022-11-02 20:39:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:12,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:12,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:12,025 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:12,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:39:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:12,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-02 20:39:12,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:12,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:12,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:12,766 INFO L356 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2022-11-02 20:39:12,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 45 [2022-11-02 20:39:12,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:13,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:13,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:13,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:39:13,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:39:13,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:13,533 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:13,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 31 [2022-11-02 20:39:13,547 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:39:13,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 84 treesize of output 57 [2022-11-02 20:39:13,616 INFO L356 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2022-11-02 20:39:13,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 142 treesize of output 180 [2022-11-02 20:39:13,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 25 [2022-11-02 20:39:13,816 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:13,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 28 [2022-11-02 20:39:13,833 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:13,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 45 [2022-11-02 20:39:13,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-02 20:39:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:39:16,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909603195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:16,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:16,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-11-02 20:39:16,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047798413] [2022-11-02 20:39:16,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:16,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:39:16,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:16,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:39:16,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=709, Unknown=9, NotChecked=0, Total=812 [2022-11-02 20:39:16,431 INFO L87 Difference]: Start difference. First operand 281 states and 322 transitions. Second operand has 29 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 25 states have internal predecessors, (110), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:39:17,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:17,256 INFO L93 Difference]: Finished difference Result 308 states and 347 transitions. [2022-11-02 20:39:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:39:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 25 states have internal predecessors, (110), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2022-11-02 20:39:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:17,259 INFO L225 Difference]: With dead ends: 308 [2022-11-02 20:39:17,259 INFO L226 Difference]: Without dead ends: 308 [2022-11-02 20:39:17,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 17 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=167, Invalid=1014, Unknown=9, NotChecked=0, Total=1190 [2022-11-02 20:39:17,261 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 298 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:17,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 911 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 562 Invalid, 0 Unknown, 479 Unchecked, 0.5s Time] [2022-11-02 20:39:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-02 20:39:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 281. [2022-11-02 20:39:17,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 235 states have (on average 1.2382978723404254) internal successors, (291), 258 states have internal predecessors, (291), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-02 20:39:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 321 transitions. [2022-11-02 20:39:17,271 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 321 transitions. Word has length 60 [2022-11-02 20:39:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:17,272 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 321 transitions. [2022-11-02 20:39:17,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 25 states have internal predecessors, (110), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:39:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 321 transitions. [2022-11-02 20:39:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:39:17,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:17,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-11-02 20:39:17,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:17,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:17,498 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:39:17,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:17,499 INFO L85 PathProgramCache]: Analyzing trace with hash 115708676, now seen corresponding path program 1 times [2022-11-02 20:39:17,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:17,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261558764] [2022-11-02 20:39:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:17,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:18,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:39:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:18,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:39:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:39:18,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:18,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261558764] [2022-11-02 20:39:18,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261558764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:18,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543358536] [2022-11-02 20:39:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:18,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:18,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:18,803 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:18,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:39:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-02 20:39:19,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:19,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:19,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:19,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:19,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:19,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2022-11-02 20:39:19,873 INFO L356 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2022-11-02 20:39:19,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:19,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2022-11-02 20:39:19,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:20,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2022-11-02 20:39:20,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:20,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2022-11-02 20:39:20,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:20,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:39:20,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 17 [2022-11-02 20:39:20,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:39:20,286 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:20,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 17 [2022-11-02 20:39:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:39:20,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:20,419 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_5024 (Array Int Int)) (v_ArrVal_5025 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_5024) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_5025) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_5024 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_5024) c_append_~head.base) .cse0)))))) is different from false [2022-11-02 20:39:23,388 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:23,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 93 treesize of output 94 [2022-11-02 20:39:23,402 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:23,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 95 treesize of output 86 [2022-11-02 20:39:23,421 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:39:23,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 140 treesize of output 113 [2022-11-02 20:39:23,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:39:23,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 172 treesize of output 142 [2022-11-02 20:39:23,462 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:23,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 207 treesize of output 221 [2022-11-02 20:39:23,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 185 treesize of output 169 [2022-11-02 20:39:23,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 194 treesize of output 170 [2022-11-02 20:39:23,509 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:23,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 169 treesize of output 187 [2022-11-02 20:39:23,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 149 treesize of output 145 [2022-11-02 20:39:27,879 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:27,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:27,890 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:27,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:27,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:27,976 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:27,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:27,986 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:27,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:27,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:39:28,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:28,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:28,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:39:28,025 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:28,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:28,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 105 [2022-11-02 20:39:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-11-02 20:39:29,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543358536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:39:29,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:39:29,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-11-02 20:39:29,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878650241] [2022-11-02 20:39:29,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:29,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:39:29,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:39:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=827, Unknown=2, NotChecked=58, Total=992 [2022-11-02 20:39:29,217 INFO L87 Difference]: Start difference. First operand 281 states and 321 transitions. Second operand has 32 states, 31 states have (on average 4.032258064516129) internal successors, (125), 28 states have internal predecessors, (125), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:39:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:30,565 INFO L93 Difference]: Finished difference Result 365 states and 425 transitions. [2022-11-02 20:39:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:39:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.032258064516129) internal successors, (125), 28 states have internal predecessors, (125), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2022-11-02 20:39:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:30,569 INFO L225 Difference]: With dead ends: 365 [2022-11-02 20:39:30,569 INFO L226 Difference]: Without dead ends: 365 [2022-11-02 20:39:30,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=250, Invalid=1392, Unknown=2, NotChecked=78, Total=1722 [2022-11-02 20:39:30,570 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:30,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1124 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 453 Invalid, 0 Unknown, 610 Unchecked, 0.4s Time] [2022-11-02 20:39:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-02 20:39:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 267. [2022-11-02 20:39:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 222 states have (on average 1.2477477477477477) internal successors, (277), 245 states have internal predecessors, (277), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-02 20:39:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 305 transitions. [2022-11-02 20:39:30,582 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 305 transitions. Word has length 60 [2022-11-02 20:39:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:30,582 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 305 transitions. [2022-11-02 20:39:30,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.032258064516129) internal successors, (125), 28 states have internal predecessors, (125), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 20:39:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 305 transitions. [2022-11-02 20:39:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-02 20:39:30,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:30,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-11-02 20:39:30,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:39:30,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:30,798 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-02 20:39:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash -452149625, now seen corresponding path program 1 times [2022-11-02 20:39:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:30,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193087678] [2022-11-02 20:39:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:32,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:39:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:35,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:39:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:39,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193087678] [2022-11-02 20:39:39,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193087678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:39,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607990649] [2022-11-02 20:39:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:39,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:39:39,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:39,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:39:39,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65a24602-47c2-4c19-af1d-fe7d722620b1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:39:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-02 20:39:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:39:40,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:40,226 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:39:40,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-11-02 20:39:40,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:40,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:39:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:40,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2022-11-02 20:39:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:40,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2022-11-02 20:39:41,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2022-11-02 20:39:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:45,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:45,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2022-11-02 20:39:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:45,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2022-11-02 20:39:45,068 INFO L356 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-11-02 20:39:45,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 46 [2022-11-02 20:39:46,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:46,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:46,559 INFO L356 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-02 20:39:46,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 76 [2022-11-02 20:39:46,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:46,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:46,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:39:46,613 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-02 20:39:46,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 45 [2022-11-02 20:39:46,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:39:46,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-11-02 20:39:46,673 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-02 20:39:46,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-02 20:39:47,047 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-02 20:39:47,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-11-02 20:39:47,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-11-02 20:39:47,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 [2022-11-02 20:39:47,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-02 20:39:47,273 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:39:47,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 10 [2022-11-02 20:39:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:39:47,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:39:47,296 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_5355 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_5355) c_append_~head.base) c_append_~head.offset) 0)) (forall ((v_ArrVal_5354 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_5354) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2022-11-02 20:39:55,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607990649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:39:55,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:39:55,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 48 [2022-11-02 20:39:55,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650810456] [2022-11-02 20:39:55,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:39:55,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 20:39:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 20:39:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2298, Unknown=59, NotChecked=98, Total=2652 [2022-11-02 20:39:55,553 INFO L87 Difference]: Start difference. First operand 267 states and 305 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 44 states have internal predecessors, (102), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)