./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:16:45,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:16:45,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:16:45,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:16:45,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:16:45,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:16:45,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:16:45,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:16:45,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:16:45,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:16:45,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:16:45,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:16:45,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:16:45,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:16:45,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:16:45,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:16:45,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:16:45,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:16:45,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:16:45,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:16:45,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:16:45,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:16:45,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:16:45,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:16:45,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:16:45,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:16:45,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:16:45,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:16:45,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:16:45,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:16:45,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:16:45,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:16:45,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:16:45,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:16:45,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:16:45,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:16:45,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:16:45,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:16:45,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:16:45,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:16:45,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:16:45,580 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:16:45,615 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:16:45,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:16:45,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:16:45,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:16:45,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:16:45,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:16:45,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:16:45,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:16:45,618 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:16:45,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:16:45,618 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:16:45,621 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:16:45,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:16:45,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:16:45,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:16:45,622 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:16:45,622 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:16:45,623 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:16:45,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:16:45,623 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:16:45,623 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:16:45,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:16:45,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:16:45,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:16:45,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:16:45,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:16:45,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:16:45,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:16:45,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:16:45,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:16:45,626 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_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2022-11-16 12:16:45,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:16:45,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:16:45,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:16:45,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:16:45,931 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:16:45,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-11-16 12:16:46,028 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/data/2b75973ca/842b7477db2143d7a00f2feeff429b0e/FLAG414061f0d [2022-11-16 12:16:46,574 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:16:46,574 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-11-16 12:16:46,585 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/data/2b75973ca/842b7477db2143d7a00f2feeff429b0e/FLAG414061f0d [2022-11-16 12:16:46,888 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/data/2b75973ca/842b7477db2143d7a00f2feeff429b0e [2022-11-16 12:16:46,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:16:46,892 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:16:46,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:16:46,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:16:46,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:16:46,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:16:46" (1/1) ... [2022-11-16 12:16:46,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3a6cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:46, skipping insertion in model container [2022-11-16 12:16:46,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:16:46" (1/1) ... [2022-11-16 12:16:46,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:16:46,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:16:47,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:16:47,252 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:16:47,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:16:47,313 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:16:47,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47 WrapperNode [2022-11-16 12:16:47,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:16:47,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:16:47,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:16:47,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:16:47,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,384 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-11-16 12:16:47,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:16:47,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:16:47,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:16:47,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:16:47,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:16:47,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:16:47,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:16:47,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:16:47,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (1/1) ... [2022-11-16 12:16:47,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:16:47,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:47,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:16:47,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:16:47,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:16:47,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:16:47,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:16:47,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:16:47,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:16:47,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:16:47,660 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:16:47,662 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:16:47,917 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:16:47,923 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:16:47,936 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 12:16:47,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:16:47 BoogieIcfgContainer [2022-11-16 12:16:47,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:16:47,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:16:47,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:16:47,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:16:47,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:16:46" (1/3) ... [2022-11-16 12:16:47,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27573362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:16:47, skipping insertion in model container [2022-11-16 12:16:47,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:16:47" (2/3) ... [2022-11-16 12:16:47,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27573362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:16:47, skipping insertion in model container [2022-11-16 12:16:47,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:16:47" (3/3) ... [2022-11-16 12:16:47,948 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2022-11-16 12:16:47,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:16:47,966 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-11-16 12:16:48,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:16:48,051 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;@49de65e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:16:48,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-16 12:16:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 12:16:48,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:48,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:48,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:48,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031113, now seen corresponding path program 1 times [2022-11-16 12:16:48,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:48,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782503094] [2022-11-16 12:16:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:48,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782503094] [2022-11-16 12:16:48,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782503094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:48,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:48,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:16:48,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509310572] [2022-11-16 12:16:48,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:48,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:16:48,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:16:48,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:16:48,300 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:48,401 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-16 12:16:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:16:48,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 12:16:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:48,421 INFO L225 Difference]: With dead ends: 51 [2022-11-16 12:16:48,424 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 12:16:48,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:16:48,431 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:48,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:16:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 12:16:48,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-16 12:16:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-16 12:16:48,466 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 7 [2022-11-16 12:16:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:48,466 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-16 12:16:48,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-16 12:16:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:16:48,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:48,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:48,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:16:48,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:48,469 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-11-16 12:16:48,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:48,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4546683] [2022-11-16 12:16:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:48,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:48,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:48,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4546683] [2022-11-16 12:16:48,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4546683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:48,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:48,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:16:48,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730545030] [2022-11-16 12:16:48,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:48,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:16:48,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:16:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:16:48,695 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:48,791 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-16 12:16:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:16:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2022-11-16 12:16:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:48,792 INFO L225 Difference]: With dead ends: 51 [2022-11-16 12:16:48,793 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 12:16:48,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:16:48,794 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:48,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 185 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:16:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 12:16:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-16 12:16:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-16 12:16:48,801 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2022-11-16 12:16:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:48,801 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-16 12:16:48,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-16 12:16:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:16:48,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:48,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:48,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:16:48,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:48,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:48,804 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-11-16 12:16:48,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:48,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627235892] [2022-11-16 12:16:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:49,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627235892] [2022-11-16 12:16:49,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627235892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:49,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:49,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:16:49,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264558020] [2022-11-16 12:16:49,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:16:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:49,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:16:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:16:49,062 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:49,108 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-16 12:16:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:16:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-11-16 12:16:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:49,110 INFO L225 Difference]: With dead ends: 46 [2022-11-16 12:16:49,112 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 12:16:49,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:16:49,114 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:49,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:16:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 12:16:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-16 12:16:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-16 12:16:49,129 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 8 [2022-11-16 12:16:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:49,130 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-16 12:16:49,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:49,131 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-16 12:16:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 12:16:49,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:49,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:49,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:16:49,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:49,138 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-11-16 12:16:49,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:49,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663763428] [2022-11-16 12:16:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:49,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:49,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:49,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663763428] [2022-11-16 12:16:49,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663763428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:49,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:49,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:16:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179024430] [2022-11-16 12:16:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:49,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:16:49,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:16:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:16:49,579 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:49,729 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-16 12:16:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:16:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 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 8 [2022-11-16 12:16:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:49,732 INFO L225 Difference]: With dead ends: 50 [2022-11-16 12:16:49,732 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 12:16:49,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:16:49,745 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 106 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:49,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 98 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:16:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 12:16:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-11-16 12:16:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:49,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-16 12:16:49,759 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2022-11-16 12:16:49,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:49,760 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-16 12:16:49,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-16 12:16:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 12:16:49,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:49,762 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:49,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:16:49,763 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-11-16 12:16:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:49,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904846889] [2022-11-16 12:16:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:49,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:50,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:50,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904846889] [2022-11-16 12:16:50,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904846889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:50,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179676442] [2022-11-16 12:16:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:50,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:50,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:50,146 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:50,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:16:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:16:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:50,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:50,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 11 [2022-11-16 12:16:50,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:16:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:50,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:50,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:16:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:50,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179676442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:16:50,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:16:50,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-11-16 12:16:50,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708248239] [2022-11-16 12:16:50,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:50,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:16:50,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:50,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:16:50,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:16:50,822 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:51,126 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-11-16 12:16:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:16:51,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 12:16:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:51,128 INFO L225 Difference]: With dead ends: 85 [2022-11-16 12:16:51,128 INFO L226 Difference]: Without dead ends: 85 [2022-11-16 12:16:51,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:16:51,129 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 138 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:51,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 251 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:16:51,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-16 12:16:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 46. [2022-11-16 12:16:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.65625) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-16 12:16:51,134 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2022-11-16 12:16:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:51,134 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-16 12:16:51,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-16 12:16:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:16:51,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:51,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:51,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 12:16:51,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:51,341 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash 840060780, now seen corresponding path program 1 times [2022-11-16 12:16:51,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:51,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401678344] [2022-11-16 12:16:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:51,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:51,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401678344] [2022-11-16 12:16:51,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401678344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126230715] [2022-11-16 12:16:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:51,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:51,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:51,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:51,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:16:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:51,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:16:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:51,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:16:51,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126230715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:51,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:16:51,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-11-16 12:16:51,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321909499] [2022-11-16 12:16:51,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:51,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:16:51,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:51,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:16:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:16:51,797 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:51,919 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-16 12:16:51,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:16:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 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 14 [2022-11-16 12:16:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:51,920 INFO L225 Difference]: With dead ends: 45 [2022-11-16 12:16:51,920 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 12:16:51,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:16:51,922 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 165 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:51,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 63 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:16:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 12:16:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-16 12:16:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.625) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-16 12:16:51,937 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2022-11-16 12:16:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:51,938 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-16 12:16:51,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-16 12:16:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:16:51,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:51,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:51,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:16:52,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:52,156 INFO L85 PathProgramCache]: Analyzing trace with hash 840060832, now seen corresponding path program 1 times [2022-11-16 12:16:52,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:52,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980913466] [2022-11-16 12:16:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:16:52,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:52,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980913466] [2022-11-16 12:16:52,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980913466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:52,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:52,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:16:52,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874618589] [2022-11-16 12:16:52,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:52,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:16:52,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:52,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:16:52,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:16:52,212 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:52,231 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-11-16 12:16:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:16:52,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-11-16 12:16:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:52,236 INFO L225 Difference]: With dead ends: 81 [2022-11-16 12:16:52,237 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 12:16:52,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:16:52,238 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 64 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:52,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 97 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:16:52,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 12:16:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-11-16 12:16:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-11-16 12:16:52,244 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2022-11-16 12:16:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:52,245 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-11-16 12:16:52,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-11-16 12:16:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:16:52,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:52,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:52,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:16:52,246 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:52,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125410, now seen corresponding path program 1 times [2022-11-16 12:16:52,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:52,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109488622] [2022-11-16 12:16:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:52,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:16:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:52,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109488622] [2022-11-16 12:16:52,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109488622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:52,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:52,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:16:52,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033273174] [2022-11-16 12:16:52,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:52,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:16:52,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:16:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:16:52,295 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:52,329 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-11-16 12:16:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:16:52,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-11-16 12:16:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:52,330 INFO L225 Difference]: With dead ends: 52 [2022-11-16 12:16:52,331 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 12:16:52,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:16:52,332 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:52,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:16:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 12:16:52,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-16 12:16:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-11-16 12:16:52,335 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2022-11-16 12:16:52,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:52,336 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-11-16 12:16:52,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-11-16 12:16:52,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:16:52,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:52,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:52,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:16:52,338 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:52,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2022-11-16 12:16:52,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:52,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636533865] [2022-11-16 12:16:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:52,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:52,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636533865] [2022-11-16 12:16:52,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636533865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:52,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369113261] [2022-11-16 12:16:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:52,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:52,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:52,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:52,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:16:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:16:52,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:52,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:52,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369113261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:16:52,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:16:52,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-16 12:16:52,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942287493] [2022-11-16 12:16:52,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:52,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:16:52,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:16:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:16:52,657 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:52,882 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2022-11-16 12:16:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:16:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:16:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:52,884 INFO L225 Difference]: With dead ends: 122 [2022-11-16 12:16:52,884 INFO L226 Difference]: Without dead ends: 122 [2022-11-16 12:16:52,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:16:52,886 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 390 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:52,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 239 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:16:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-16 12:16:52,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 56. [2022-11-16 12:16:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-16 12:16:52,916 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 14 [2022-11-16 12:16:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:52,916 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-16 12:16:52,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-16 12:16:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:16:52,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:52,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:52,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:53,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:16:53,123 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash 272080408, now seen corresponding path program 1 times [2022-11-16 12:16:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:53,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947154331] [2022-11-16 12:16:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:16:53,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947154331] [2022-11-16 12:16:53,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947154331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:53,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:53,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:16:53,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053359055] [2022-11-16 12:16:53,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:53,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:16:53,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:16:53,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:16:53,272 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:53,310 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-16 12:16:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:16:53,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2022-11-16 12:16:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:53,312 INFO L225 Difference]: With dead ends: 83 [2022-11-16 12:16:53,312 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 12:16:53,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:16:53,313 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:53,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 78 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:16:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 12:16:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2022-11-16 12:16:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-16 12:16:53,316 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 15 [2022-11-16 12:16:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:53,316 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-16 12:16:53,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:53,317 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-16 12:16:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:16:53,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:53,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:16:53,318 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash 530245846, now seen corresponding path program 1 times [2022-11-16 12:16:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:53,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377233692] [2022-11-16 12:16:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:53,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:53,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:53,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377233692] [2022-11-16 12:16:53,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377233692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:53,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533885501] [2022-11-16 12:16:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:53,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:53,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:53,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:53,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:16:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:53,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:16:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:53,698 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:16:53,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:16:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:16:53,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:16:53,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533885501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:53,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:16:53,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-16 12:16:53,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663519912] [2022-11-16 12:16:53,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:53,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:16:53,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:16:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:16:53,837 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:53,877 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-11-16 12:16:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:16:53,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2022-11-16 12:16:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:53,879 INFO L225 Difference]: With dead ends: 59 [2022-11-16 12:16:53,879 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 12:16:53,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:16:53,880 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:53,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:16:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 12:16:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-11-16 12:16:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-11-16 12:16:53,889 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 15 [2022-11-16 12:16:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:53,890 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-11-16 12:16:53,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-11-16 12:16:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:16:53,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:53,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:53,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:54,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:54,099 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash 944154227, now seen corresponding path program 1 times [2022-11-16 12:16:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:54,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809524022] [2022-11-16 12:16:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:54,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:54,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809524022] [2022-11-16 12:16:54,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809524022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:54,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:54,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:16:54,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177383628] [2022-11-16 12:16:54,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:54,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:16:54,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:16:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:16:54,201 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:54,263 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-16 12:16:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:16:54,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2022-11-16 12:16:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:54,266 INFO L225 Difference]: With dead ends: 54 [2022-11-16 12:16:54,266 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 12:16:54,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:16:54,267 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:54,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:16:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 12:16:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-11-16 12:16:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:54,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-11-16 12:16:54,273 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 18 [2022-11-16 12:16:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:54,274 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-11-16 12:16:54,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-11-16 12:16:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:16:54,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:54,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:54,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:16:54,280 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:54,281 INFO L85 PathProgramCache]: Analyzing trace with hash 944154228, now seen corresponding path program 1 times [2022-11-16 12:16:54,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:54,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090611580] [2022-11-16 12:16:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:54,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:54,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090611580] [2022-11-16 12:16:54,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090611580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:54,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551064799] [2022-11-16 12:16:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:54,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:54,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:54,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:54,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:16:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:54,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:16:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:54,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:54,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-16 12:16:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:54,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551064799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:16:54,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:16:54,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-11-16 12:16:54,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882940412] [2022-11-16 12:16:54,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:54,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:16:54,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:54,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:16:54,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:16:54,721 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:54,952 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-11-16 12:16:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:16:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 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 18 [2022-11-16 12:16:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:54,953 INFO L225 Difference]: With dead ends: 78 [2022-11-16 12:16:54,954 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 12:16:54,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:16:54,954 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:54,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 133 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:16:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 12:16:54,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2022-11-16 12:16:54,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.38) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:54,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-11-16 12:16:54,957 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 18 [2022-11-16 12:16:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:54,957 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-11-16 12:16:54,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-11-16 12:16:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:16:54,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:54,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:54,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:16:55,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash -907528666, now seen corresponding path program 2 times [2022-11-16 12:16:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:55,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973305190] [2022-11-16 12:16:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:55,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:55,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:55,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973305190] [2022-11-16 12:16:55,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973305190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:55,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135462050] [2022-11-16 12:16:55,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:16:55,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:55,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:55,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:55,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:16:55,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:16:55,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:16:55,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:16:55,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:55,600 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:16:55,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:16:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:16:55,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:16:55,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135462050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:55,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:16:55,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2022-11-16 12:16:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191093543] [2022-11-16 12:16:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:55,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:16:55,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:16:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:16:55,757 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:55,831 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-16 12:16:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:16:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 18 [2022-11-16 12:16:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:55,832 INFO L225 Difference]: With dead ends: 56 [2022-11-16 12:16:55,832 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 12:16:55,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:16:55,833 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:55,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 58 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:16:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 12:16:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-16 12:16:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.36) internal successors, (68), 55 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-11-16 12:16:55,836 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 18 [2022-11-16 12:16:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:55,836 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-11-16 12:16:55,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-11-16 12:16:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:16:55,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:55,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:55,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:16:56,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:16:56,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1095465713, now seen corresponding path program 1 times [2022-11-16 12:16:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:56,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221575021] [2022-11-16 12:16:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:16:56,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:56,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221575021] [2022-11-16 12:16:56,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221575021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:16:56,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:16:56,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:16:56,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552386371] [2022-11-16 12:16:56,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:16:56,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:16:56,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:56,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:16:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:16:56,124 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:56,155 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2022-11-16 12:16:56,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:16:56,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:16:56,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:56,157 INFO L225 Difference]: With dead ends: 115 [2022-11-16 12:16:56,157 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 12:16:56,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:16:56,160 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:56,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 129 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:16:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 12:16:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2022-11-16 12:16:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-11-16 12:16:56,164 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 20 [2022-11-16 12:16:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:56,166 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-11-16 12:16:56,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-11-16 12:16:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:16:56,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:56,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:56,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:16:56,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:16:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:16:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1094114349, now seen corresponding path program 1 times [2022-11-16 12:16:56,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:16:56,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801903186] [2022-11-16 12:16:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:56,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:16:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:56,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:56,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801903186] [2022-11-16 12:16:56,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801903186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:56,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907426789] [2022-11-16 12:16:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:56,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:56,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:56,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:56,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:16:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:56,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:16:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:57,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:16:57,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:16:57,272 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-16 12:16:57,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:16:57,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:16:57,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:16:57,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-11-16 12:16:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:57,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:57,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 12:16:57,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 12:16:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:16:57,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907426789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:16:57,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:16:57,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2022-11-16 12:16:57,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122681864] [2022-11-16 12:16:57,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:16:57,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:16:57,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:16:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:16:57,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:16:57,957 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:16:59,933 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2022-11-16 12:16:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:16:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:16:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:16:59,936 INFO L225 Difference]: With dead ends: 161 [2022-11-16 12:16:59,936 INFO L226 Difference]: Without dead ends: 161 [2022-11-16 12:16:59,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=495, Invalid=2585, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 12:16:59,938 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 282 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:16:59,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 519 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 384 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-11-16 12:16:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-16 12:16:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2022-11-16 12:16:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.280373831775701) internal successors, (137), 112 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2022-11-16 12:16:59,942 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 20 [2022-11-16 12:16:59,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:16:59,944 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2022-11-16 12:16:59,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:16:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2022-11-16 12:16:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:16:59,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:16:59,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:16:59,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:00,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:17:00,153 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:00,153 INFO L85 PathProgramCache]: Analyzing trace with hash 74397359, now seen corresponding path program 1 times [2022-11-16 12:17:00,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:00,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005445512] [2022-11-16 12:17:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:00,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:00,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005445512] [2022-11-16 12:17:00,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005445512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:00,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:17:00,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:17:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138009197] [2022-11-16 12:17:00,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:17:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:00,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:17:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:17:00,245 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:00,270 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2022-11-16 12:17:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:17:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:17:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:00,272 INFO L225 Difference]: With dead ends: 125 [2022-11-16 12:17:00,272 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 12:17:00,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:17:00,273 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 66 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:00,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 73 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:17:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 12:17:00,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 76. [2022-11-16 12:17:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 75 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-11-16 12:17:00,279 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 20 [2022-11-16 12:17:00,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:00,279 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-11-16 12:17:00,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-11-16 12:17:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:17:00,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:00,283 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] [2022-11-16 12:17:00,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:17:00,283 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash -442195040, now seen corresponding path program 1 times [2022-11-16 12:17:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:00,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027513792] [2022-11-16 12:17:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:00,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:00,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:00,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027513792] [2022-11-16 12:17:00,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027513792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:00,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:17:00,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:17:00,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065447302] [2022-11-16 12:17:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:00,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:17:00,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:17:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:17:00,364 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:00,433 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-16 12:17:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:17:00,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 21 [2022-11-16 12:17:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:00,435 INFO L225 Difference]: With dead ends: 75 [2022-11-16 12:17:00,435 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 12:17:00,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:17:00,437 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:00,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 84 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:17:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 12:17:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-16 12:17:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-11-16 12:17:00,440 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 21 [2022-11-16 12:17:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:00,440 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-11-16 12:17:00,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-11-16 12:17:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:17:00,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:00,441 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] [2022-11-16 12:17:00,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:17:00,442 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:00,442 INFO L85 PathProgramCache]: Analyzing trace with hash -442195039, now seen corresponding path program 1 times [2022-11-16 12:17:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:00,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899557724] [2022-11-16 12:17:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:00,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:00,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899557724] [2022-11-16 12:17:00,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899557724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:00,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:17:00,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:17:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619263862] [2022-11-16 12:17:00,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:00,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:17:00,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:17:00,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:17:00,686 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:00,836 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-11-16 12:17:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:17:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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 21 [2022-11-16 12:17:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:00,838 INFO L225 Difference]: With dead ends: 83 [2022-11-16 12:17:00,838 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 12:17:00,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:17:00,839 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:00,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 101 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:17:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 12:17:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2022-11-16 12:17:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 76 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2022-11-16 12:17:00,842 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 21 [2022-11-16 12:17:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:00,844 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2022-11-16 12:17:00,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2022-11-16 12:17:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:17:00,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:00,845 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] [2022-11-16 12:17:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:17:00,845 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:00,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1330977111, now seen corresponding path program 2 times [2022-11-16 12:17:00,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:00,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4006184] [2022-11-16 12:17:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:01,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:01,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4006184] [2022-11-16 12:17:01,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4006184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:01,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295842607] [2022-11-16 12:17:01,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:17:01,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:01,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:01,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:01,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:17:01,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:17:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:01,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 12:17:01,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:01,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:01,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:17:01,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:17:02,020 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:17:02,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:17:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:02,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:02,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:02,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:17:02,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:02,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:17:02,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:02,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295842607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:02,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:02,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2022-11-16 12:17:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846734834] [2022-11-16 12:17:02,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:02,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:17:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:02,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:17:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1076, Unknown=10, NotChecked=0, Total=1190 [2022-11-16 12:17:02,603 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:05,771 INFO L93 Difference]: Finished difference Result 314 states and 351 transitions. [2022-11-16 12:17:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 12:17:05,772 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 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 26 [2022-11-16 12:17:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:05,773 INFO L225 Difference]: With dead ends: 314 [2022-11-16 12:17:05,773 INFO L226 Difference]: Without dead ends: 314 [2022-11-16 12:17:05,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=628, Invalid=3918, Unknown=10, NotChecked=0, Total=4556 [2022-11-16 12:17:05,775 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 921 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:05,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 1201 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1116 Invalid, 0 Unknown, 267 Unchecked, 0.8s Time] [2022-11-16 12:17:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-16 12:17:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 120. [2022-11-16 12:17:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.2521739130434784) internal successors, (144), 119 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2022-11-16 12:17:05,781 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 26 [2022-11-16 12:17:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:05,781 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2022-11-16 12:17:05,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2022-11-16 12:17:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:17:05,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:05,782 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] [2022-11-16 12:17:05,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:05,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:05,983 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash 803583084, now seen corresponding path program 1 times [2022-11-16 12:17:05,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:05,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058948294] [2022-11-16 12:17:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:05,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:06,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:06,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058948294] [2022-11-16 12:17:06,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058948294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:06,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:17:06,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:17:06,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166331611] [2022-11-16 12:17:06,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:06,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:17:06,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:17:06,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:17:06,160 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:06,183 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2022-11-16 12:17:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:17:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 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 27 [2022-11-16 12:17:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:06,184 INFO L225 Difference]: With dead ends: 119 [2022-11-16 12:17:06,184 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 12:17:06,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:17:06,185 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:06,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:17:06,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 12:17:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-16 12:17:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-11-16 12:17:06,189 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 27 [2022-11-16 12:17:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:06,189 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-11-16 12:17:06,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-11-16 12:17:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:17:06,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:06,191 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:06,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 12:17:06,191 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:06,192 INFO L85 PathProgramCache]: Analyzing trace with hash 805151438, now seen corresponding path program 1 times [2022-11-16 12:17:06,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:06,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020156089] [2022-11-16 12:17:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:06,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:06,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:06,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020156089] [2022-11-16 12:17:06,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020156089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:06,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:17:06,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:17:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427673438] [2022-11-16 12:17:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:17:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:17:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:17:06,293 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:06,342 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2022-11-16 12:17:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:17:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 27 [2022-11-16 12:17:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:06,343 INFO L225 Difference]: With dead ends: 170 [2022-11-16 12:17:06,344 INFO L226 Difference]: Without dead ends: 137 [2022-11-16 12:17:06,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:17:06,344 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:06,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:17:06,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-16 12:17:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-11-16 12:17:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 133 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2022-11-16 12:17:06,348 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 27 [2022-11-16 12:17:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:06,348 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2022-11-16 12:17:06,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2022-11-16 12:17:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:17:06,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:06,350 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:06,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 12:17:06,350 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1000286896, now seen corresponding path program 1 times [2022-11-16 12:17:06,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:06,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619238088] [2022-11-16 12:17:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:06,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:06,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619238088] [2022-11-16 12:17:06,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619238088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288307795] [2022-11-16 12:17:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:06,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:06,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:17:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 12:17:06,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:06,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:17:06,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:06,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-16 12:17:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:06,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:07,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 12:17:07,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 12:17:07,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-16 12:17:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:07,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288307795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:07,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:07,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-16 12:17:07,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937938819] [2022-11-16 12:17:07,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:07,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:17:07,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:17:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:17:07,402 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:07,989 INFO L93 Difference]: Finished difference Result 164 states and 180 transitions. [2022-11-16 12:17:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:17:07,989 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 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 27 [2022-11-16 12:17:07,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:07,990 INFO L225 Difference]: With dead ends: 164 [2022-11-16 12:17:07,990 INFO L226 Difference]: Without dead ends: 150 [2022-11-16 12:17:07,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:17:07,991 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 98 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:07,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 329 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 222 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2022-11-16 12:17:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-16 12:17:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2022-11-16 12:17:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 137 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:08,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2022-11-16 12:17:08,003 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 27 [2022-11-16 12:17:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:08,003 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2022-11-16 12:17:08,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2022-11-16 12:17:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 12:17:08,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:08,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:08,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:08,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 12:17:08,210 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 697237728, now seen corresponding path program 1 times [2022-11-16 12:17:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374757587] [2022-11-16 12:17:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:09,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:09,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374757587] [2022-11-16 12:17:09,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374757587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:09,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76370011] [2022-11-16 12:17:09,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:09,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:09,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:09,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:09,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:17:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 12:17:09,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:09,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:09,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:17:09,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:17:09,756 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-11-16 12:17:09,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 20 [2022-11-16 12:17:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:09,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:10,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:10,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 37 [2022-11-16 12:17:10,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:10,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 61 [2022-11-16 12:17:10,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:10,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2022-11-16 12:17:10,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:10,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76370011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:10,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:10,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-11-16 12:17:10,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403354907] [2022-11-16 12:17:10,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:10,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:17:10,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:10,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:17:10,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1054, Unknown=5, NotChecked=0, Total=1190 [2022-11-16 12:17:10,530 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:11,107 INFO L93 Difference]: Finished difference Result 175 states and 195 transitions. [2022-11-16 12:17:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:17:11,108 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 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 28 [2022-11-16 12:17:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:11,108 INFO L225 Difference]: With dead ends: 175 [2022-11-16 12:17:11,109 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 12:17:11,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=268, Invalid=1707, Unknown=5, NotChecked=0, Total=1980 [2022-11-16 12:17:11,110 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 163 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:11,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 286 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 140 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-11-16 12:17:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 12:17:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 161. [2022-11-16 12:17:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 160 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2022-11-16 12:17:11,114 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 28 [2022-11-16 12:17:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:11,114 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2022-11-16 12:17:11,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2022-11-16 12:17:11,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 12:17:11,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:11,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:11,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:11,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:17:11,321 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1853207525, now seen corresponding path program 3 times [2022-11-16 12:17:11,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:11,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708761298] [2022-11-16 12:17:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708761298] [2022-11-16 12:17:11,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708761298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587230358] [2022-11-16 12:17:11,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:17:11,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:11,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:11,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:17:11,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:17:11,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 12:17:12,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:12,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:12,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:17:12,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:17:12,585 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:17:12,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:17:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:12,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:12,829 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-11-16 12:17:12,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:12,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:17:12,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:12,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:17:13,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:13,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587230358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:13,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:13,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-11-16 12:17:13,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702284049] [2022-11-16 12:17:13,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:13,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 12:17:13,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 12:17:13,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1443, Unknown=1, NotChecked=76, Total=1640 [2022-11-16 12:17:13,209 INFO L87 Difference]: Start difference. First operand 161 states and 181 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:19,446 INFO L93 Difference]: Finished difference Result 276 states and 300 transitions. [2022-11-16 12:17:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 12:17:19,447 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 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 32 [2022-11-16 12:17:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:19,448 INFO L225 Difference]: With dead ends: 276 [2022-11-16 12:17:19,448 INFO L226 Difference]: Without dead ends: 244 [2022-11-16 12:17:19,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 5 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=834, Invalid=5331, Unknown=1, NotChecked=154, Total=6320 [2022-11-16 12:17:19,452 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 439 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 650 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:19,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 959 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1214 Invalid, 0 Unknown, 650 Unchecked, 0.9s Time] [2022-11-16 12:17:19,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-16 12:17:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 187. [2022-11-16 12:17:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 183 states have (on average 1.1420765027322404) internal successors, (209), 186 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 209 transitions. [2022-11-16 12:17:19,457 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 209 transitions. Word has length 32 [2022-11-16 12:17:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:19,458 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 209 transitions. [2022-11-16 12:17:19,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 209 transitions. [2022-11-16 12:17:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 12:17:19,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:19,460 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:19,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:19,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:17:19,666 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1456363364, now seen corresponding path program 2 times [2022-11-16 12:17:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:19,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092291963] [2022-11-16 12:17:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:19,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:20,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:20,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092291963] [2022-11-16 12:17:20,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092291963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:20,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779421398] [2022-11-16 12:17:20,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:17:20,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:20,720 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:20,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:17:20,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:17:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 12:17:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:20,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:21,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:17:21,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:17:23,998 INFO L321 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-16 12:17:23,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 41 treesize of output 30 [2022-11-16 12:17:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:24,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:26,970 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_418 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_418) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-11-16 12:17:26,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:26,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2022-11-16 12:17:27,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:27,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 86 treesize of output 90 [2022-11-16 12:17:27,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:27,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 22 [2022-11-16 12:17:27,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:27,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779421398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:27,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:27,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-11-16 12:17:27,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220468421] [2022-11-16 12:17:27,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 12:17:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 12:17:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1542, Unknown=7, NotChecked=80, Total=1806 [2022-11-16 12:17:27,822 INFO L87 Difference]: Start difference. First operand 187 states and 209 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:38,835 INFO L93 Difference]: Finished difference Result 224 states and 251 transitions. [2022-11-16 12:17:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:17:38,835 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 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 34 [2022-11-16 12:17:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:38,836 INFO L225 Difference]: With dead ends: 224 [2022-11-16 12:17:38,836 INFO L226 Difference]: Without dead ends: 224 [2022-11-16 12:17:38,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=384, Invalid=2805, Unknown=7, NotChecked=110, Total=3306 [2022-11-16 12:17:38,838 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:38,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 426 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 312 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-11-16 12:17:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-16 12:17:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 208. [2022-11-16 12:17:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.1470588235294117) internal successors, (234), 207 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2022-11-16 12:17:38,843 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 34 [2022-11-16 12:17:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:38,843 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2022-11-16 12:17:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2022-11-16 12:17:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 12:17:38,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:38,844 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 12:17:38,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:39,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:39,057 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:39,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:39,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1627622054, now seen corresponding path program 2 times [2022-11-16 12:17:39,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:39,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427349455] [2022-11-16 12:17:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:39,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:39,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:39,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427349455] [2022-11-16 12:17:39,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427349455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:39,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293313663] [2022-11-16 12:17:39,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:17:39,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:39,400 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:39,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:17:39,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:17:39,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:39,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:17:39,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:39,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:17:39,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 12:17:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:17:39,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:17:39,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293313663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:39,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:17:39,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-11-16 12:17:39,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499585368] [2022-11-16 12:17:39,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:39,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:17:39,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:39,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:17:39,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:17:39,747 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:39,940 INFO L93 Difference]: Finished difference Result 269 states and 298 transitions. [2022-11-16 12:17:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:17:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 12:17:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:39,941 INFO L225 Difference]: With dead ends: 269 [2022-11-16 12:17:39,941 INFO L226 Difference]: Without dead ends: 231 [2022-11-16 12:17:39,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-16 12:17:39,942 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:39,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 213 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:17:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-16 12:17:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 197. [2022-11-16 12:17:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 193 states have (on average 1.145077720207254) internal successors, (221), 196 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 221 transitions. [2022-11-16 12:17:39,947 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 221 transitions. Word has length 37 [2022-11-16 12:17:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:39,947 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 221 transitions. [2022-11-16 12:17:39,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:39,948 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 221 transitions. [2022-11-16 12:17:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 12:17:39,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:39,948 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 12:17:39,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:40,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:17:40,149 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:40,149 INFO L85 PathProgramCache]: Analyzing trace with hash 423361944, now seen corresponding path program 1 times [2022-11-16 12:17:40,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:40,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607624831] [2022-11-16 12:17:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:40,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:40,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607624831] [2022-11-16 12:17:40,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607624831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:40,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695955926] [2022-11-16 12:17:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:40,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:40,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:40,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:40,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:17:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 12:17:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:40,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:17:40,863 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:17:40,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:17:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:17:40,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:17:40,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695955926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:17:40,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:17:40,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 19 [2022-11-16 12:17:40,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811735072] [2022-11-16 12:17:40,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:17:40,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:17:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:17:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:17:40,896 INFO L87 Difference]: Start difference. First operand 197 states and 221 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:40,990 INFO L93 Difference]: Finished difference Result 274 states and 305 transitions. [2022-11-16 12:17:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:17:40,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 12:17:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:40,992 INFO L225 Difference]: With dead ends: 274 [2022-11-16 12:17:40,993 INFO L226 Difference]: Without dead ends: 240 [2022-11-16 12:17:40,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:17:40,998 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:41,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 182 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-16 12:17:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-16 12:17:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 201. [2022-11-16 12:17:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.1522842639593909) internal successors, (227), 200 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2022-11-16 12:17:41,010 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 37 [2022-11-16 12:17:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:41,013 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2022-11-16 12:17:41,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2022-11-16 12:17:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 12:17:41,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:41,015 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:41,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:41,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:17:41,221 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash 763708385, now seen corresponding path program 4 times [2022-11-16 12:17:41,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:41,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513624254] [2022-11-16 12:17:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:41,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:42,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:42,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513624254] [2022-11-16 12:17:42,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513624254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:42,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637657240] [2022-11-16 12:17:42,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:17:42,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:42,027 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:42,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:17:42,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:17:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 12:17:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:42,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:42,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:17:42,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:17:43,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:17:43,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:43,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 12:17:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:43,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:43,453 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_529 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_529) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-16 12:17:43,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:43,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:17:43,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:43,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:17:43,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 12:17:44,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:17:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:44,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637657240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:44,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:44,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 47 [2022-11-16 12:17:44,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56003837] [2022-11-16 12:17:44,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:44,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:17:44,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:44,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:17:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1941, Unknown=1, NotChecked=88, Total=2162 [2022-11-16 12:17:44,046 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:49,313 INFO L93 Difference]: Finished difference Result 403 states and 439 transitions. [2022-11-16 12:17:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 12:17:49,314 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 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 38 [2022-11-16 12:17:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:49,315 INFO L225 Difference]: With dead ends: 403 [2022-11-16 12:17:49,315 INFO L226 Difference]: Without dead ends: 363 [2022-11-16 12:17:49,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=847, Invalid=7897, Unknown=2, NotChecked=184, Total=8930 [2022-11-16 12:17:49,318 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 293 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:49,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1772 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2179 Invalid, 0 Unknown, 317 Unchecked, 1.5s Time] [2022-11-16 12:17:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-16 12:17:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 230. [2022-11-16 12:17:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.1415929203539823) internal successors, (258), 229 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 258 transitions. [2022-11-16 12:17:49,333 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 258 transitions. Word has length 38 [2022-11-16 12:17:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:49,333 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 258 transitions. [2022-11-16 12:17:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 258 transitions. [2022-11-16 12:17:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 12:17:49,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:49,335 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:49,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:49,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:17:49,541 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:17:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -910015720, now seen corresponding path program 3 times [2022-11-16 12:17:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:49,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923625639] [2022-11-16 12:17:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:49,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:50,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:50,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923625639] [2022-11-16 12:17:50,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923625639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:50,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270938963] [2022-11-16 12:17:50,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:17:50,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:50,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:50,952 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:50,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:17:51,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 12:17:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:51,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 12:17:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:51,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:17:52,002 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-16 12:17:52,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:17:53,016 INFO L321 Elim1Store]: treesize reduction 37, result has 41.3 percent of original size [2022-11-16 12:17:53,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 12:17:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:53,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:53,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-11-16 12:17:53,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:17:53,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 61 [2022-11-16 12:17:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:54,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270938963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:54,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:54,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 51 [2022-11-16 12:17:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058559592] [2022-11-16 12:17:54,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:54,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 12:17:54,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 12:17:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2310, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 12:17:54,393 INFO L87 Difference]: Start difference. First operand 230 states and 258 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:00,427 INFO L93 Difference]: Finished difference Result 465 states and 505 transitions. [2022-11-16 12:18:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 12:18:00,428 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 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 40 [2022-11-16 12:18:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:00,430 INFO L225 Difference]: With dead ends: 465 [2022-11-16 12:18:00,430 INFO L226 Difference]: Without dead ends: 439 [2022-11-16 12:18:00,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1294, Invalid=7826, Unknown=0, NotChecked=0, Total=9120 [2022-11-16 12:18:00,433 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1252 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 364 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:00,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 592 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 693 Invalid, 0 Unknown, 364 Unchecked, 0.7s Time] [2022-11-16 12:18:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-16 12:18:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 245. [2022-11-16 12:18:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 241 states have (on average 1.1452282157676348) internal successors, (276), 244 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 276 transitions. [2022-11-16 12:18:00,441 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 276 transitions. Word has length 40 [2022-11-16 12:18:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:00,441 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 276 transitions. [2022-11-16 12:18:00,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:00,442 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 276 transitions. [2022-11-16 12:18:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 12:18:00,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:00,443 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-16 12:18:00,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:00,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:00,649 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:18:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2063863029, now seen corresponding path program 1 times [2022-11-16 12:18:00,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:00,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683071324] [2022-11-16 12:18:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:18:00,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:00,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683071324] [2022-11-16 12:18:00,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683071324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:00,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908407348] [2022-11-16 12:18:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:00,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:00,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:00,938 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:00,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:18:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:01,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:18:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:01,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:01,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:18:01,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:18:01,694 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:18:01,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:18:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:01,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:01,874 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_609 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_609) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 12:18:01,945 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_609 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_609) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-11-16 12:18:01,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:01,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 12:18:01,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:01,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 12:18:02,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 12:18:02,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908407348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:02,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:02,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 36 [2022-11-16 12:18:02,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256785476] [2022-11-16 12:18:02,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:02,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 12:18:02,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:02,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 12:18:02,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=987, Unknown=20, NotChecked=130, Total=1260 [2022-11-16 12:18:02,344 INFO L87 Difference]: Start difference. First operand 245 states and 276 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:04,170 INFO L93 Difference]: Finished difference Result 292 states and 324 transitions. [2022-11-16 12:18:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 12:18:04,171 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 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 41 [2022-11-16 12:18:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:04,172 INFO L225 Difference]: With dead ends: 292 [2022-11-16 12:18:04,172 INFO L226 Difference]: Without dead ends: 286 [2022-11-16 12:18:04,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=671, Invalid=4007, Unknown=22, NotChecked=270, Total=4970 [2022-11-16 12:18:04,174 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 291 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:04,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 453 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 352 Invalid, 0 Unknown, 402 Unchecked, 0.3s Time] [2022-11-16 12:18:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-16 12:18:04,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 247. [2022-11-16 12:18:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 243 states have (on average 1.1440329218106995) internal successors, (278), 246 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 278 transitions. [2022-11-16 12:18:04,181 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 278 transitions. Word has length 41 [2022-11-16 12:18:04,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:04,181 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 278 transitions. [2022-11-16 12:18:04,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 278 transitions. [2022-11-16 12:18:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 12:18:04,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:04,183 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 12:18:04,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:04,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:04,388 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:18:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1091941255, now seen corresponding path program 1 times [2022-11-16 12:18:04,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061117146] [2022-11-16 12:18:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:04,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:18:04,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:04,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061117146] [2022-11-16 12:18:04,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061117146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:04,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798592344] [2022-11-16 12:18:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:04,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:04,692 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:04,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:18:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 12:18:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:04,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:05,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:18:05,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:18:05,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:18:05,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-16 12:18:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:18:05,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:05,656 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_651) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-11-16 12:18:05,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:05,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 12:18:05,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:05,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 12:18:05,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 12:18:06,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2022-11-16 12:18:06,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798592344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:06,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:06,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 17] total 39 [2022-11-16 12:18:06,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114816805] [2022-11-16 12:18:06,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:06,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:18:06,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:06,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:18:06,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1273, Unknown=1, NotChecked=72, Total=1482 [2022-11-16 12:18:06,370 INFO L87 Difference]: Start difference. First operand 247 states and 278 transitions. Second operand has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:07,837 INFO L93 Difference]: Finished difference Result 304 states and 334 transitions. [2022-11-16 12:18:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 12:18:07,838 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 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 42 [2022-11-16 12:18:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:07,839 INFO L225 Difference]: With dead ends: 304 [2022-11-16 12:18:07,839 INFO L226 Difference]: Without dead ends: 280 [2022-11-16 12:18:07,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=428, Invalid=3481, Unknown=1, NotChecked=122, Total=4032 [2022-11-16 12:18:07,840 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 168 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:07,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 461 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 307 Invalid, 0 Unknown, 175 Unchecked, 0.2s Time] [2022-11-16 12:18:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-16 12:18:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 235. [2022-11-16 12:18:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.1428571428571428) internal successors, (264), 234 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 264 transitions. [2022-11-16 12:18:07,846 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 264 transitions. Word has length 42 [2022-11-16 12:18:07,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:07,846 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 264 transitions. [2022-11-16 12:18:07,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 264 transitions. [2022-11-16 12:18:07,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 12:18:07,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:07,848 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:07,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:08,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:08,053 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:18:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash 734238365, now seen corresponding path program 5 times [2022-11-16 12:18:08,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:08,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976745045] [2022-11-16 12:18:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:08,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:08,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:08,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976745045] [2022-11-16 12:18:08,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976745045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067978120] [2022-11-16 12:18:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:18:08,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:08,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:08,892 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:08,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:18:09,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 12:18:09,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 12:18:09,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:09,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:09,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:18:09,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:18:10,130 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:18:10,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:18:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:10,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:10,573 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_693 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_693) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-16 12:18:10,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:10,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:18:10,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:10,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:18:11,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:11,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067978120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:11,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:11,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2022-11-16 12:18:11,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033855112] [2022-11-16 12:18:11,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:11,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 12:18:11,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:11,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 12:18:11,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2500, Unknown=1, NotChecked=100, Total=2756 [2022-11-16 12:18:11,207 INFO L87 Difference]: Start difference. First operand 235 states and 264 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:17,153 INFO L93 Difference]: Finished difference Result 434 states and 472 transitions. [2022-11-16 12:18:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 12:18:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 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 44 [2022-11-16 12:18:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:17,156 INFO L225 Difference]: With dead ends: 434 [2022-11-16 12:18:17,156 INFO L226 Difference]: Without dead ends: 390 [2022-11-16 12:18:17,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 1 IntricatePredicates, 7 DeprecatedPredicates, 2472 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=724, Invalid=9378, Unknown=2, NotChecked=198, Total=10302 [2022-11-16 12:18:17,158 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 260 mSDsluCounter, 1937 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:17,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 2004 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2476 Invalid, 0 Unknown, 435 Unchecked, 1.7s Time] [2022-11-16 12:18:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-16 12:18:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 264. [2022-11-16 12:18:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1346153846153846) internal successors, (295), 263 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 295 transitions. [2022-11-16 12:18:17,166 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 295 transitions. Word has length 44 [2022-11-16 12:18:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:17,166 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 295 transitions. [2022-11-16 12:18:17,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 295 transitions. [2022-11-16 12:18:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:18:17,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:17,168 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-16 12:18:17,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:17,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 12:18:17,373 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:18:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:17,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1097682670, now seen corresponding path program 2 times [2022-11-16 12:18:17,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:17,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587853689] [2022-11-16 12:18:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:17,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:17,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:17,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587853689] [2022-11-16 12:18:17,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587853689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:17,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963196745] [2022-11-16 12:18:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:18:17,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:17,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:17,755 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:17,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:18:17,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:18:17,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:18:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:17,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:17,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 11 [2022-11-16 12:18:18,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:18:18,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:18:18,504 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:18,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-16 12:18:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:18,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:19,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:19,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 12:18:19,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:19,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-16 12:18:19,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:18:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:19,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963196745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:19,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:19,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-16 12:18:19,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315540993] [2022-11-16 12:18:19,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:19,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 12:18:19,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 12:18:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1506, Unknown=3, NotChecked=0, Total=1640 [2022-11-16 12:18:19,734 INFO L87 Difference]: Start difference. First operand 264 states and 295 transitions. Second operand has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:21,547 INFO L93 Difference]: Finished difference Result 327 states and 358 transitions. [2022-11-16 12:18:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 12:18:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 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 45 [2022-11-16 12:18:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:21,549 INFO L225 Difference]: With dead ends: 327 [2022-11-16 12:18:21,550 INFO L226 Difference]: Without dead ends: 315 [2022-11-16 12:18:21,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=530, Invalid=5017, Unknown=3, NotChecked=0, Total=5550 [2022-11-16 12:18:21,551 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:21,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 386 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 380 Invalid, 0 Unknown, 210 Unchecked, 0.3s Time] [2022-11-16 12:18:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-16 12:18:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 264. [2022-11-16 12:18:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1307692307692307) internal successors, (294), 263 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 294 transitions. [2022-11-16 12:18:21,557 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 294 transitions. Word has length 45 [2022-11-16 12:18:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:21,558 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 294 transitions. [2022-11-16 12:18:21,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.682926829268293) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 294 transitions. [2022-11-16 12:18:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 12:18:21,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:21,559 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:21,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-16 12:18:21,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 12:18:21,765 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:18:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1476579412, now seen corresponding path program 4 times [2022-11-16 12:18:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:21,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340822356] [2022-11-16 12:18:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:21,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:18:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:24,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340822356] [2022-11-16 12:18:24,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340822356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:24,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694494870] [2022-11-16 12:18:24,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:18:24,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:24,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:24,126 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:24,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:18:24,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:18:24,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:24,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-16 12:18:24,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:24,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:24,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:18:24,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:18:25,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:25,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 23 [2022-11-16 12:18:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:18:25,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:26,214 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_785 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_785) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2022-11-16 12:18:26,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:26,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 73 [2022-11-16 12:18:26,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:26,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 148 [2022-11-16 12:18:26,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2022-11-16 12:18:27,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:18:27,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694494870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:27,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:27,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 56 [2022-11-16 12:18:27,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529847812] [2022-11-16 12:18:27,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:27,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 12:18:27,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:27,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 12:18:27,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2723, Unknown=1, NotChecked=106, Total=3080 [2022-11-16 12:18:27,479 INFO L87 Difference]: Start difference. First operand 264 states and 294 transitions. Second operand has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:45,032 INFO L93 Difference]: Finished difference Result 400 states and 437 transitions. [2022-11-16 12:18:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:18:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 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 46 [2022-11-16 12:18:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:45,034 INFO L225 Difference]: With dead ends: 400 [2022-11-16 12:18:45,034 INFO L226 Difference]: Without dead ends: 370 [2022-11-16 12:18:45,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1182, Invalid=8327, Unknown=1, NotChecked=192, Total=9702 [2022-11-16 12:18:45,035 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 565 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:45,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 629 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1256 Invalid, 0 Unknown, 118 Unchecked, 1.1s Time] [2022-11-16 12:18:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-16 12:18:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 281. [2022-11-16 12:18:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 277 states have (on average 1.1371841155234657) internal successors, (315), 280 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 315 transitions. [2022-11-16 12:18:45,042 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 315 transitions. Word has length 46 [2022-11-16 12:18:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:45,042 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 315 transitions. [2022-11-16 12:18:45,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 315 transitions. [2022-11-16 12:18:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 12:18:45,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:45,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-16 12:18:45,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:45,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:45,249 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:18:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1193977735, now seen corresponding path program 1 times [2022-11-16 12:18:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909747050] [2022-11-16 12:18:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:18:45,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909747050] [2022-11-16 12:18:45,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909747050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807456457] [2022-11-16 12:18:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:45,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:45,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:45,628 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:45,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:18:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 12:18:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:45,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:18:46,264 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:18:46,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-16 12:18:46,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-11-16 12:18:46,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:46,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-11-16 12:18:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:46,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:46,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:46,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-16 12:18:48,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:48,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 12:18:48,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:18:48,078 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:18:48,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 11 [2022-11-16 12:18:48,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 11 refuted. 1 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:48,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807456457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:48,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:48,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 52 [2022-11-16 12:18:48,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20989582] [2022-11-16 12:18:48,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:48,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:18:48,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:48,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:18:48,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2473, Unknown=6, NotChecked=0, Total=2652 [2022-11-16 12:18:48,379 INFO L87 Difference]: Start difference. First operand 281 states and 315 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:50,961 INFO L93 Difference]: Finished difference Result 556 states and 610 transitions. [2022-11-16 12:18:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 12:18:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 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 47 [2022-11-16 12:18:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:50,963 INFO L225 Difference]: With dead ends: 556 [2022-11-16 12:18:50,963 INFO L226 Difference]: Without dead ends: 532 [2022-11-16 12:18:50,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=733, Invalid=9161, Unknown=6, NotChecked=0, Total=9900 [2022-11-16 12:18:50,965 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 319 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:50,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 351 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 510 Invalid, 0 Unknown, 262 Unchecked, 0.4s Time] [2022-11-16 12:18:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-16 12:18:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 365. [2022-11-16 12:18:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 361 states have (on average 1.149584487534626) internal successors, (415), 364 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 415 transitions. [2022-11-16 12:18:50,973 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 415 transitions. Word has length 47 [2022-11-16 12:18:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:50,974 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 415 transitions. [2022-11-16 12:18:50,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 52 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 415 transitions. [2022-11-16 12:18:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:18:50,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:50,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-16 12:18:50,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-16 12:18:51,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 12:18:51,181 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:18:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash 994210165, now seen corresponding path program 2 times [2022-11-16 12:18:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:51,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883624517] [2022-11-16 12:18:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:18:51,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:51,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883624517] [2022-11-16 12:18:51,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883624517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:51,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401382771] [2022-11-16 12:18:51,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:18:51,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:51,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:51,863 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:51,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:18:52,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:18:52,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:52,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 12:18:52,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:52,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:18:52,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:52,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 12:18:52,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 12:18:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:52,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:54,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 122 [2022-11-16 12:18:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:18:54,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401382771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:54,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:54,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 39 [2022-11-16 12:18:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984371938] [2022-11-16 12:18:54,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:54,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:18:54,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:18:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1348, Unknown=1, NotChecked=0, Total=1482 [2022-11-16 12:18:54,955 INFO L87 Difference]: Start difference. First operand 365 states and 415 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:55,860 INFO L93 Difference]: Finished difference Result 474 states and 522 transitions. [2022-11-16 12:18:55,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:18:55,861 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 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 48 [2022-11-16 12:18:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:55,862 INFO L225 Difference]: With dead ends: 474 [2022-11-16 12:18:55,862 INFO L226 Difference]: Without dead ends: 378 [2022-11-16 12:18:55,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=302, Invalid=2453, Unknown=1, NotChecked=0, Total=2756 [2022-11-16 12:18:55,864 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 144 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:55,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 475 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 285 Invalid, 0 Unknown, 223 Unchecked, 0.2s Time] [2022-11-16 12:18:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-16 12:18:55,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 333. [2022-11-16 12:18:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 329 states have (on average 1.127659574468085) internal successors, (371), 332 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 371 transitions. [2022-11-16 12:18:55,871 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 371 transitions. Word has length 48 [2022-11-16 12:18:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:55,872 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 371 transitions. [2022-11-16 12:18:55,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 371 transitions. [2022-11-16 12:18:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 12:18:55,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:55,873 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:55,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:56,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 12:18:56,079 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:18:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1776899047, now seen corresponding path program 6 times [2022-11-16 12:18:56,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:56,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422579260] [2022-11-16 12:18:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:56,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:56,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422579260] [2022-11-16 12:18:56,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422579260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:56,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711080425] [2022-11-16 12:18:56,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:18:56,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:56,952 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:56,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:18:57,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-16 12:18:57,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:57,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 12:18:57,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:57,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:57,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:18:57,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:18:58,412 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:18:58,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:18:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:58,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:58,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:58,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:18:58,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:18:58,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:18:59,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:18:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:59,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711080425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:59,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:59,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 59 [2022-11-16 12:18:59,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729702039] [2022-11-16 12:18:59,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:59,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-16 12:18:59,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:59,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-16 12:18:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3228, Unknown=16, NotChecked=0, Total=3422 [2022-11-16 12:18:59,704 INFO L87 Difference]: Start difference. First operand 333 states and 371 transitions. Second operand has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 59 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:06,440 INFO L93 Difference]: Finished difference Result 610 states and 662 transitions. [2022-11-16 12:19:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 12:19:06,441 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 59 states have internal predecessors, (139), 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 50 [2022-11-16 12:19:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:06,443 INFO L225 Difference]: With dead ends: 610 [2022-11-16 12:19:06,443 INFO L226 Difference]: Without dead ends: 551 [2022-11-16 12:19:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1194, Invalid=11900, Unknown=16, NotChecked=0, Total=13110 [2022-11-16 12:19:06,445 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 528 mSDsluCounter, 2425 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:06,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 2500 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2523 Invalid, 0 Unknown, 541 Unchecked, 1.6s Time] [2022-11-16 12:19:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-16 12:19:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 370. [2022-11-16 12:19:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 366 states have (on average 1.1202185792349726) internal successors, (410), 369 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 410 transitions. [2022-11-16 12:19:06,454 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 410 transitions. Word has length 50 [2022-11-16 12:19:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:06,454 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 410 transitions. [2022-11-16 12:19:06,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 59 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:06,455 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 410 transitions. [2022-11-16 12:19:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:19:06,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:06,456 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:06,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 12:19:06,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 12:19:06,662 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:19:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:06,662 INFO L85 PathProgramCache]: Analyzing trace with hash -558804912, now seen corresponding path program 5 times [2022-11-16 12:19:06,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:06,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050660165] [2022-11-16 12:19:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:06,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:19:09,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:09,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050660165] [2022-11-16 12:19:09,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050660165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:09,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839138928] [2022-11-16 12:19:09,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:19:09,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:09,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:09,959 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:09,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:19:10,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-16 12:19:10,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:19:10,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 12:19:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:10,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:19:10,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:19:10,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:19:13,437 INFO L321 Elim1Store]: treesize reduction 27, result has 55.7 percent of original size [2022-11-16 12:19:13,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 60 [2022-11-16 12:19:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:19:13,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:13,916 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_969 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_969) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-11-16 12:19:13,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:19:13,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 85 [2022-11-16 12:19:13,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:19:13,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 161 treesize of output 177 [2022-11-16 12:19:14,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2022-11-16 12:19:14,350 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-16 12:19:15,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:19:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 48 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:19:15,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839138928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:15,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:15,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 63 [2022-11-16 12:19:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770503919] [2022-11-16 12:19:15,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:15,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-16 12:19:15,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-16 12:19:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3472, Unknown=1, NotChecked=120, Total=3906 [2022-11-16 12:19:15,579 INFO L87 Difference]: Start difference. First operand 370 states and 410 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:30,372 INFO L93 Difference]: Finished difference Result 482 states and 532 transitions. [2022-11-16 12:19:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 12:19:30,373 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 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 52 [2022-11-16 12:19:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:30,374 INFO L225 Difference]: With dead ends: 482 [2022-11-16 12:19:30,374 INFO L226 Difference]: Without dead ends: 442 [2022-11-16 12:19:30,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=586, Invalid=5737, Unknown=1, NotChecked=156, Total=6480 [2022-11-16 12:19:30,376 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 311 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:30,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 656 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 551 Invalid, 0 Unknown, 246 Unchecked, 0.7s Time] [2022-11-16 12:19:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-16 12:19:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 391. [2022-11-16 12:19:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 387 states have (on average 1.124031007751938) internal successors, (435), 390 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 435 transitions. [2022-11-16 12:19:30,384 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 435 transitions. Word has length 52 [2022-11-16 12:19:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:30,384 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 435 transitions. [2022-11-16 12:19:30,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 435 transitions. [2022-11-16 12:19:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:19:30,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:30,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-16 12:19:30,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:30,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 12:19:30,586 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:19:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1217377784, now seen corresponding path program 3 times [2022-11-16 12:19:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:30,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793332754] [2022-11-16 12:19:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:19:30,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793332754] [2022-11-16 12:19:30,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793332754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058439471] [2022-11-16 12:19:30,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:19:30,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:30,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:30,889 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:30,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:19:31,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:19:31,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:19:31,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:19:31,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:31,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:19:31,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 [2022-11-16 12:19:31,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:19:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:19:32,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:34,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:19:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:19:34,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058439471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:34,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:34,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 17] total 49 [2022-11-16 12:19:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935302278] [2022-11-16 12:19:34,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:34,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:19:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:19:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2087, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:19:34,795 INFO L87 Difference]: Start difference. First operand 391 states and 435 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:46,824 INFO L93 Difference]: Finished difference Result 622 states and 669 transitions. [2022-11-16 12:19:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-16 12:19:46,825 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 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 52 [2022-11-16 12:19:46,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:46,827 INFO L225 Difference]: With dead ends: 622 [2022-11-16 12:19:46,827 INFO L226 Difference]: Without dead ends: 590 [2022-11-16 12:19:46,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3884 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=3142, Invalid=13370, Unknown=0, NotChecked=0, Total=16512 [2022-11-16 12:19:46,828 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2032 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2032 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:46,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2032 Valid, 320 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:19:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-16 12:19:46,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 365. [2022-11-16 12:19:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 361 states have (on average 1.1274238227146813) internal successors, (407), 364 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 407 transitions. [2022-11-16 12:19:46,837 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 407 transitions. Word has length 52 [2022-11-16 12:19:46,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:46,837 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 407 transitions. [2022-11-16 12:19:46,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 49 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 407 transitions. [2022-11-16 12:19:46,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 12:19:46,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:46,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2022-11-16 12:19:46,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-16 12:19:47,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:47,047 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:19:47,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:47,047 INFO L85 PathProgramCache]: Analyzing trace with hash 651549555, now seen corresponding path program 2 times [2022-11-16 12:19:47,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:47,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072341053] [2022-11-16 12:19:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:47,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:19:47,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072341053] [2022-11-16 12:19:47,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072341053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090269354] [2022-11-16 12:19:47,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:19:47,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:47,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:47,475 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:47,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 12:19:47,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:19:47,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:19:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:19:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:47,672 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:19:47,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:19:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:19:47,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:19:48,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090269354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:48,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:48,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-11-16 12:19:48,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620719631] [2022-11-16 12:19:48,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:48,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:19:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:19:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:19:48,267 INFO L87 Difference]: Start difference. First operand 365 states and 407 transitions. Second operand has 30 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:49,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:49,129 INFO L93 Difference]: Finished difference Result 469 states and 509 transitions. [2022-11-16 12:19:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:19:49,130 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 30 states have internal predecessors, (98), 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 55 [2022-11-16 12:19:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:49,132 INFO L225 Difference]: With dead ends: 469 [2022-11-16 12:19:49,132 INFO L226 Difference]: Without dead ends: 469 [2022-11-16 12:19:49,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:19:49,133 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 429 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:49,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 420 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:19:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-16 12:19:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 388. [2022-11-16 12:19:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 384 states have (on average 1.1197916666666667) internal successors, (430), 387 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 430 transitions. [2022-11-16 12:19:49,141 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 430 transitions. Word has length 55 [2022-11-16 12:19:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:49,142 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 430 transitions. [2022-11-16 12:19:49,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 30 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:19:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 430 transitions. [2022-11-16 12:19:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 12:19:49,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:49,143 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:49,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:19:49,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:49,351 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:19:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:49,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1402960811, now seen corresponding path program 7 times [2022-11-16 12:19:49,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:49,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686184395] [2022-11-16 12:19:49,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:49,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:50,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686184395] [2022-11-16 12:19:50,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686184395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:50,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901127553] [2022-11-16 12:19:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:19:50,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:50,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:50,386 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:50,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 12:19:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:50,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-16 12:19:50,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:50,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:19:51,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:19:51,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:19:52,077 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:19:52,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:19:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:52,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:52,801 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1121 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1121) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-16 12:19:52,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:19:52,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:19:52,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:19:52,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:19:53,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:19:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:53,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901127553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:53,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:53,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 65 [2022-11-16 12:19:53,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413423347] [2022-11-16 12:19:53,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:53,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 12:19:53,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:53,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 12:19:53,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3837, Unknown=1, NotChecked=124, Total=4160 [2022-11-16 12:19:53,787 INFO L87 Difference]: Start difference. First operand 388 states and 430 transitions. Second operand has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:20:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:02,625 INFO L93 Difference]: Finished difference Result 669 states and 722 transitions. [2022-11-16 12:20:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 12:20:02,626 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 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 56 [2022-11-16 12:20:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:02,627 INFO L225 Difference]: With dead ends: 669 [2022-11-16 12:20:02,628 INFO L226 Difference]: Without dead ends: 647 [2022-11-16 12:20:02,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 1 IntricatePredicates, 9 DeprecatedPredicates, 4198 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=975, Invalid=14777, Unknown=2, NotChecked=248, Total=16002 [2022-11-16 12:20:02,630 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 349 mSDsluCounter, 3835 mSDsCounter, 0 mSdLazyCounter, 4440 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 5510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1047 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:02,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 3925 Invalid, 5510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4440 Invalid, 0 Unknown, 1047 Unchecked, 3.1s Time] [2022-11-16 12:20:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-16 12:20:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 449. [2022-11-16 12:20:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.1168539325842697) internal successors, (497), 448 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:20:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 497 transitions. [2022-11-16 12:20:02,641 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 497 transitions. Word has length 56 [2022-11-16 12:20:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:02,642 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 497 transitions. [2022-11-16 12:20:02,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:20:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 497 transitions. [2022-11-16 12:20:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 12:20:02,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:02,644 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:02,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-16 12:20:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-16 12:20:02,850 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:20:02,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1250411276, now seen corresponding path program 6 times [2022-11-16 12:20:02,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:02,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654798034] [2022-11-16 12:20:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:02,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:20:05,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:05,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654798034] [2022-11-16 12:20:05,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654798034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:20:05,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014965588] [2022-11-16 12:20:05,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:20:05,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:05,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:05,651 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:05,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 12:20:05,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-16 12:20:05,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:20:05,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-16 12:20:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:06,094 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:20:06,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 12:20:07,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:20:07,644 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-16 12:20:07,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 12:20:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:20:10,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:20:12,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:20:12,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 379 treesize of output 403 [2022-11-16 12:20:24,829 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-16 12:20:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 64 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:25,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014965588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:20:25,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:20:25,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 32] total 85 [2022-11-16 12:20:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576951668] [2022-11-16 12:20:25,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:20:25,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-16 12:20:25,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:25,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-16 12:20:25,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=6545, Unknown=0, NotChecked=0, Total=7140 [2022-11-16 12:20:25,075 INFO L87 Difference]: Start difference. First operand 449 states and 497 transitions. Second operand has 85 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 85 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:20:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:51,121 INFO L93 Difference]: Finished difference Result 890 states and 965 transitions. [2022-11-16 12:20:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-16 12:20:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 85 states have internal predecessors, (163), 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 58 [2022-11-16 12:20:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:51,125 INFO L225 Difference]: With dead ends: 890 [2022-11-16 12:20:51,125 INFO L226 Difference]: Without dead ends: 852 [2022-11-16 12:20:51,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8107 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=2762, Invalid=23970, Unknown=0, NotChecked=0, Total=26732 [2022-11-16 12:20:51,128 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1087 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 918 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:51,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1087 Valid, 787 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1265 Invalid, 0 Unknown, 918 Unchecked, 1.5s Time] [2022-11-16 12:20:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-11-16 12:20:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 498. [2022-11-16 12:20:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 494 states have (on average 1.1234817813765183) internal successors, (555), 497 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:20:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 555 transitions. [2022-11-16 12:20:51,139 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 555 transitions. Word has length 58 [2022-11-16 12:20:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:51,140 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 555 transitions. [2022-11-16 12:20:51,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.9176470588235295) internal successors, (163), 85 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:20:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 555 transitions. [2022-11-16 12:20:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-16 12:20:51,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:51,142 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2022-11-16 12:20:51,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:51,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:51,348 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:20:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1533222772, now seen corresponding path program 4 times [2022-11-16 12:20:51,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:51,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943063448] [2022-11-16 12:20:51,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:51,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943063448] [2022-11-16 12:20:53,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943063448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:20:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651764770] [2022-11-16 12:20:53,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:20:53,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:53,097 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:53,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 12:20:53,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:20:53,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:20:53,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 12:20:53,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:54,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:20:54,124 INFO L321 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2022-11-16 12:20:54,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-16 12:20:56,722 INFO L321 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2022-11-16 12:20:56,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 36 [2022-11-16 12:20:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:56,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:20:57,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 12:20:57,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-16 12:20:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:59,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651764770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:20:59,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:20:59,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 21] total 62 [2022-11-16 12:20:59,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002810227] [2022-11-16 12:20:59,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:20:59,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-16 12:20:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-16 12:20:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3477, Unknown=1, NotChecked=0, Total=3782 [2022-11-16 12:20:59,003 INFO L87 Difference]: Start difference. First operand 498 states and 555 transitions. Second operand has 62 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 62 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:03,419 INFO L93 Difference]: Finished difference Result 590 states and 651 transitions. [2022-11-16 12:21:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:21:03,420 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 62 states have internal predecessors, (160), 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 58 [2022-11-16 12:21:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:03,422 INFO L225 Difference]: With dead ends: 590 [2022-11-16 12:21:03,422 INFO L226 Difference]: Without dead ends: 582 [2022-11-16 12:21:03,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1200, Invalid=8501, Unknown=1, NotChecked=0, Total=9702 [2022-11-16 12:21:03,424 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 375 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:03,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 863 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 751 Invalid, 0 Unknown, 154 Unchecked, 0.8s Time] [2022-11-16 12:21:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-11-16 12:21:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 504. [2022-11-16 12:21:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.126) internal successors, (563), 503 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 563 transitions. [2022-11-16 12:21:03,433 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 563 transitions. Word has length 58 [2022-11-16 12:21:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:03,433 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 563 transitions. [2022-11-16 12:21:03,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.5806451612903225) internal successors, (160), 62 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 563 transitions. [2022-11-16 12:21:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:21:03,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:03,435 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:03,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:03,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:03,641 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:21:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash -859796103, now seen corresponding path program 3 times [2022-11-16 12:21:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:03,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192151277] [2022-11-16 12:21:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:21:04,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192151277] [2022-11-16 12:21:04,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192151277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:04,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682178960] [2022-11-16 12:21:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:21:04,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:04,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:04,126 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:04,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 12:21:04,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:21:04,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 12:21:04,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:04,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:04,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:21:05,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:21:05,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:21:05,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:21:05,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:21:05,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 12:21:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:21:05,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:05,642 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1287) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-11-16 12:21:05,651 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1287) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 12:21:05,673 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1287) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) is different from false [2022-11-16 12:21:05,687 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_1287) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2022-11-16 12:21:05,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:21:05,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 12:21:05,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:21:05,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 12:21:05,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 12:21:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 13 not checked. [2022-11-16 12:21:06,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682178960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:06,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:06,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 45 [2022-11-16 12:21:06,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575612989] [2022-11-16 12:21:06,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:06,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 12:21:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 12:21:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1491, Unknown=18, NotChecked=324, Total=1980 [2022-11-16 12:21:06,119 INFO L87 Difference]: Start difference. First operand 504 states and 563 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 45 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:09,699 INFO L93 Difference]: Finished difference Result 725 states and 794 transitions. [2022-11-16 12:21:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:21:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 45 states have internal predecessors, (133), 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 59 [2022-11-16 12:21:09,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:09,702 INFO L225 Difference]: With dead ends: 725 [2022-11-16 12:21:09,702 INFO L226 Difference]: Without dead ends: 653 [2022-11-16 12:21:09,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=851, Invalid=8652, Unknown=19, NotChecked=780, Total=10302 [2022-11-16 12:21:09,703 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 245 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 622 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:09,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 548 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 602 Invalid, 0 Unknown, 622 Unchecked, 0.5s Time] [2022-11-16 12:21:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-11-16 12:21:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 544. [2022-11-16 12:21:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 540 states have (on average 1.1222222222222222) internal successors, (606), 543 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 606 transitions. [2022-11-16 12:21:09,712 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 606 transitions. Word has length 59 [2022-11-16 12:21:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:09,713 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 606 transitions. [2022-11-16 12:21:09,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 45 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 606 transitions. [2022-11-16 12:21:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 12:21:09,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:09,715 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:09,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-16 12:21:09,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 12:21:09,921 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:21:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash -469355232, now seen corresponding path program 3 times [2022-11-16 12:21:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:09,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717113527] [2022-11-16 12:21:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:09,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:21:10,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:10,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717113527] [2022-11-16 12:21:10,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717113527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:10,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006264662] [2022-11-16 12:21:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:21:10,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:10,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:10,285 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:10,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 12:21:10,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:21:10,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:10,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 12:21:10,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:10,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:10,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:21:11,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:21:11,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:21:11,277 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 12:21:11,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:21:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:21:11,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:11,375 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1346 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1346) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-11-16 12:21:11,646 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1346 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1346) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-11-16 12:21:11,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:21:11,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 12:21:11,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:21:11,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 12:21:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 4 not checked. [2022-11-16 12:21:11,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006264662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:11,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:11,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-11-16 12:21:11,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128717441] [2022-11-16 12:21:11,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:11,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:21:11,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:21:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1189, Unknown=32, NotChecked=142, Total=1482 [2022-11-16 12:21:11,886 INFO L87 Difference]: Start difference. First operand 544 states and 606 transitions. Second operand has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 39 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:14,784 INFO L93 Difference]: Finished difference Result 897 states and 980 transitions. [2022-11-16 12:21:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 12:21:14,785 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 39 states have internal predecessors, (124), 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 61 [2022-11-16 12:21:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:14,787 INFO L225 Difference]: With dead ends: 897 [2022-11-16 12:21:14,787 INFO L226 Difference]: Without dead ends: 732 [2022-11-16 12:21:14,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=777, Invalid=7561, Unknown=42, NotChecked=362, Total=8742 [2022-11-16 12:21:14,788 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 380 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:14,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 401 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 540 Invalid, 0 Unknown, 478 Unchecked, 0.4s Time] [2022-11-16 12:21:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-11-16 12:21:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 574. [2022-11-16 12:21:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 570 states have (on average 1.119298245614035) internal successors, (638), 573 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 638 transitions. [2022-11-16 12:21:14,800 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 638 transitions. Word has length 61 [2022-11-16 12:21:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:14,800 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 638 transitions. [2022-11-16 12:21:14,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1794871794871793) internal successors, (124), 39 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 638 transitions. [2022-11-16 12:21:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:21:14,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:14,802 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:14,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:15,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 12:21:15,009 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:21:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1518395567, now seen corresponding path program 8 times [2022-11-16 12:21:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:15,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398110068] [2022-11-16 12:21:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:15,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:16,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398110068] [2022-11-16 12:21:16,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398110068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:16,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231383377] [2022-11-16 12:21:16,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:21:16,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:16,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:16,264 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:16,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 12:21:16,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:21:16,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:16,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 12:21:16,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:16,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:17,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:21:17,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:21:18,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:21:18,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:21:18,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 12:21:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:18,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:19,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:21:19,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:21:19,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:21:19,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:21:19,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 12:21:20,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:20,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231383377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:20,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:21:20,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 71 [2022-11-16 12:21:20,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076986709] [2022-11-16 12:21:20,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:20,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-16 12:21:20,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:20,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-16 12:21:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4739, Unknown=22, NotChecked=0, Total=4970 [2022-11-16 12:21:20,533 INFO L87 Difference]: Start difference. First operand 574 states and 638 transitions. Second operand has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:32,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:32,421 INFO L93 Difference]: Finished difference Result 1225 states and 1322 transitions. [2022-11-16 12:21:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-16 12:21:32,422 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 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 62 [2022-11-16 12:21:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:32,423 INFO L225 Difference]: With dead ends: 1225 [2022-11-16 12:21:32,424 INFO L226 Difference]: Without dead ends: 1122 [2022-11-16 12:21:32,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4105 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1158, Invalid=18280, Unknown=22, NotChecked=0, Total=19460 [2022-11-16 12:21:32,425 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 390 mSDsluCounter, 5168 mSDsCounter, 0 mSdLazyCounter, 5505 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 5272 SdHoareTripleChecker+Invalid, 7201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 5505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1669 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:32,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 5272 Invalid, 7201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 5505 Invalid, 0 Unknown, 1669 Unchecked, 4.2s Time] [2022-11-16 12:21:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-11-16 12:21:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 613. [2022-11-16 12:21:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 609 states have (on average 1.1116584564860428) internal successors, (677), 612 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 677 transitions. [2022-11-16 12:21:32,437 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 677 transitions. Word has length 62 [2022-11-16 12:21:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:32,438 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 677 transitions. [2022-11-16 12:21:32,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:21:32,438 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 677 transitions. [2022-11-16 12:21:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 12:21:32,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:32,440 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:32,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:32,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:32,646 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:21:32,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:32,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1312565384, now seen corresponding path program 7 times [2022-11-16 12:21:32,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:32,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997955979] [2022-11-16 12:21:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:32,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 66 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:21:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997955979] [2022-11-16 12:21:36,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997955979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:21:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293792000] [2022-11-16 12:21:36,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:21:36,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:36,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:36,297 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:36,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 12:21:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 12:21:36,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:36,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:21:37,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:21:38,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:22:42,217 INFO L321 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2022-11-16 12:22:42,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 80 [2022-11-16 12:22:42,222 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-16 12:22:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 57 proven. 127 refuted. 16 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:22:42,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:22:46,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:22:46,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 109 [2022-11-16 12:22:46,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:22:46,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 211 treesize of output 235 [2022-11-16 12:22:46,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:22:46,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 57 [2022-11-16 12:22:50,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:22:50,480 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-16 12:22:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 80 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:22:50,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293792000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:22:50,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:22:50,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 77 [2022-11-16 12:22:50,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135531940] [2022-11-16 12:22:50,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:22:50,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-16 12:22:50,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:22:50,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-16 12:22:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=5196, Unknown=33, NotChecked=0, Total=5852 [2022-11-16 12:22:50,606 INFO L87 Difference]: Start difference. First operand 613 states and 677 transitions. Second operand has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:19,309 INFO L93 Difference]: Finished difference Result 775 states and 854 transitions. [2022-11-16 12:23:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 12:23:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 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 64 [2022-11-16 12:23:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:19,311 INFO L225 Difference]: With dead ends: 775 [2022-11-16 12:23:19,311 INFO L226 Difference]: Without dead ends: 733 [2022-11-16 12:23:19,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2977 ImplicationChecksByTransitivity, 100.1s TimeCoverageRelationStatistics Valid=1457, Invalid=10053, Unknown=46, NotChecked=0, Total=11556 [2022-11-16 12:23:19,313 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 422 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:19,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 537 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 715 Invalid, 0 Unknown, 223 Unchecked, 0.8s Time] [2022-11-16 12:23:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-11-16 12:23:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 646. [2022-11-16 12:23:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 642 states have (on average 1.1137071651090342) internal successors, (715), 645 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 715 transitions. [2022-11-16 12:23:19,324 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 715 transitions. Word has length 64 [2022-11-16 12:23:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:19,324 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 715 transitions. [2022-11-16 12:23:19,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 715 transitions. [2022-11-16 12:23:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 12:23:19,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:19,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2022-11-16 12:23:19,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 12:23:19,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:19,533 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:23:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:19,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1729983568, now seen corresponding path program 5 times [2022-11-16 12:23:19,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509655995] [2022-11-16 12:23:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:19,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:22,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509655995] [2022-11-16 12:23:22,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509655995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735189971] [2022-11-16 12:23:22,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:23:22,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:22,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:22,971 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:22,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 12:23:23,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 12:23:23,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:23:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 12:23:23,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:23,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:23:24,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:23:24,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:23:26,061 INFO L321 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2022-11-16 12:23:26,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 27 [2022-11-16 12:23:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 68 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:26,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:27,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:23:27,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-11-16 12:23:27,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:23:27,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 63 [2022-11-16 12:23:27,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:23:27,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-11-16 12:23:29,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:23:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:29,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735189971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:29,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:29,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 69 [2022-11-16 12:23:29,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90839403] [2022-11-16 12:23:29,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:29,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-16 12:23:29,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:29,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-16 12:23:29,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=4328, Unknown=9, NotChecked=0, Total=4692 [2022-11-16 12:23:29,603 INFO L87 Difference]: Start difference. First operand 646 states and 715 transitions. Second operand has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 69 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:37,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:37,899 INFO L93 Difference]: Finished difference Result 748 states and 820 transitions. [2022-11-16 12:23:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 12:23:37,899 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 69 states have internal predecessors, (164), 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 64 [2022-11-16 12:23:37,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:37,901 INFO L225 Difference]: With dead ends: 748 [2022-11-16 12:23:37,901 INFO L226 Difference]: Without dead ends: 720 [2022-11-16 12:23:37,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1343, Invalid=10204, Unknown=9, NotChecked=0, Total=11556 [2022-11-16 12:23:37,902 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 511 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:37,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 712 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 873 Invalid, 0 Unknown, 225 Unchecked, 1.3s Time] [2022-11-16 12:23:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-11-16 12:23:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 650. [2022-11-16 12:23:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 646 states have (on average 1.1160990712074303) internal successors, (721), 649 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 721 transitions. [2022-11-16 12:23:37,912 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 721 transitions. Word has length 64 [2022-11-16 12:23:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:37,913 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 721 transitions. [2022-11-16 12:23:37,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.3768115942028984) internal successors, (164), 69 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 721 transitions. [2022-11-16 12:23:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 12:23:37,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:37,915 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:37,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 12:23:38,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:38,123 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:23:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash -542852876, now seen corresponding path program 1 times [2022-11-16 12:23:38,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:38,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389226020] [2022-11-16 12:23:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:23:39,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389226020] [2022-11-16 12:23:39,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389226020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063478808] [2022-11-16 12:23:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:39,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:39,211 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:39,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 12:23:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:39,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 12:23:39,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:39,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:23:39,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 11 [2022-11-16 12:23:39,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:23:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:23:40,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:41,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:23:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:23:42,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063478808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:42,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:42,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 59 [2022-11-16 12:23:42,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605047112] [2022-11-16 12:23:42,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:42,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 12:23:42,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:42,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 12:23:42,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=3204, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 12:23:42,060 INFO L87 Difference]: Start difference. First operand 650 states and 721 transitions. Second operand has 60 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:44,824 INFO L93 Difference]: Finished difference Result 1053 states and 1139 transitions. [2022-11-16 12:23:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:23:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 60 states have internal predecessors, (196), 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 66 [2022-11-16 12:23:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:44,829 INFO L225 Difference]: With dead ends: 1053 [2022-11-16 12:23:44,830 INFO L226 Difference]: Without dead ends: 995 [2022-11-16 12:23:44,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1094, Invalid=5386, Unknown=0, NotChecked=0, Total=6480 [2022-11-16 12:23:44,831 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1045 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:44,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 1083 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 12:23:44,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-11-16 12:23:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 580. [2022-11-16 12:23:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 576 states have (on average 1.1145833333333333) internal successors, (642), 579 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 642 transitions. [2022-11-16 12:23:44,841 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 642 transitions. Word has length 66 [2022-11-16 12:23:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:44,841 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 642 transitions. [2022-11-16 12:23:44,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 642 transitions. [2022-11-16 12:23:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:23:44,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:44,843 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:44,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 12:23:45,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 12:23:45,050 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:23:45,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:45,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1204996467, now seen corresponding path program 4 times [2022-11-16 12:23:45,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:45,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634172317] [2022-11-16 12:23:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:45,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:23:45,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634172317] [2022-11-16 12:23:45,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634172317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090496754] [2022-11-16 12:23:45,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:23:45,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:45,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:45,551 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:45,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 12:23:45,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:23:45,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:23:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 12:23:45,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:23:46,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:46,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:23:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:23:46,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090496754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:46,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:46,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-11-16 12:23:46,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981276544] [2022-11-16 12:23:46,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:46,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:23:46,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:46,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:23:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:23:46,642 INFO L87 Difference]: Start difference. First operand 580 states and 642 transitions. Second operand has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 31 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:23:47,728 INFO L93 Difference]: Finished difference Result 721 states and 779 transitions. [2022-11-16 12:23:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:23:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 31 states have internal predecessors, (104), 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 67 [2022-11-16 12:23:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:23:47,733 INFO L225 Difference]: With dead ends: 721 [2022-11-16 12:23:47,733 INFO L226 Difference]: Without dead ends: 721 [2022-11-16 12:23:47,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:23:47,734 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 373 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:23:47,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 589 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:23:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-11-16 12:23:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 617. [2022-11-16 12:23:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 613 states have (on average 1.1092985318107667) internal successors, (680), 616 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 680 transitions. [2022-11-16 12:23:47,742 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 680 transitions. Word has length 67 [2022-11-16 12:23:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:23:47,743 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 680 transitions. [2022-11-16 12:23:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 31 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:23:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 680 transitions. [2022-11-16 12:23:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 12:23:47,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:23:47,745 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:23:47,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-16 12:23:47,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:47,953 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:23:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:23:47,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1397521677, now seen corresponding path program 9 times [2022-11-16 12:23:47,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:23:47,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268689378] [2022-11-16 12:23:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:23:47,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:23:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:23:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:23:49,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268689378] [2022-11-16 12:23:49,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268689378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:23:49,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408845306] [2022-11-16 12:23:49,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:23:49,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:23:49,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:23:49,609 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:23:49,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-16 12:23:49,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-16 12:23:49,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:23:49,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 12:23:49,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:23:49,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:23:51,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:23:51,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:23:52,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:23:52,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-16 12:23:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:52,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:23:54,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:23:54,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:23:54,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:23:54,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:23:54,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 12:23:54,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-16 12:23:56,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:23:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:23:56,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408845306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:23:56,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:23:56,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 80 [2022-11-16 12:23:56,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010922167] [2022-11-16 12:23:56,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:23:56,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-16 12:23:56,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:23:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-16 12:23:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=5981, Unknown=1, NotChecked=0, Total=6480 [2022-11-16 12:23:56,171 INFO L87 Difference]: Start difference. First operand 617 states and 680 transitions. Second operand has 81 states, 80 states have (on average 2.45) internal successors, (196), 81 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:10,018 INFO L93 Difference]: Finished difference Result 1494 states and 1598 transitions. [2022-11-16 12:24:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-16 12:24:10,019 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 2.45) internal successors, (196), 81 states have internal predecessors, (196), 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 68 [2022-11-16 12:24:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:10,023 INFO L225 Difference]: With dead ends: 1494 [2022-11-16 12:24:10,023 INFO L226 Difference]: Without dead ends: 1470 [2022-11-16 12:24:10,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4617 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=2541, Invalid=20410, Unknown=1, NotChecked=0, Total=22952 [2022-11-16 12:24:10,026 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1137 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 4154 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 5217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1000 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:10,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 3764 Invalid, 5217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4154 Invalid, 0 Unknown, 1000 Unchecked, 3.7s Time] [2022-11-16 12:24:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-11-16 12:24:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 653. [2022-11-16 12:24:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 649 states have (on average 1.1063174114021572) internal successors, (718), 652 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 718 transitions. [2022-11-16 12:24:10,040 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 718 transitions. Word has length 68 [2022-11-16 12:24:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:10,041 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 718 transitions. [2022-11-16 12:24:10,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 2.45) internal successors, (196), 81 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 718 transitions. [2022-11-16 12:24:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 12:24:10,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:10,043 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:24:10,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:10,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-16 12:24:10,250 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:24:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1306431354, now seen corresponding path program 10 times [2022-11-16 12:24:10,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:10,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588000314] [2022-11-16 12:24:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:10,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:24:11,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588000314] [2022-11-16 12:24:11,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588000314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:24:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453945573] [2022-11-16 12:24:11,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:24:11,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:11,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:11,533 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:24:11,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-16 12:24:11,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:24:11,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:24:11,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-16 12:24:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:24:11,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:24:12,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:24:12,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:24:13,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 12:24:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:24:13,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:24:13,263 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1752 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1752) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-11-16 12:24:13,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:24:13,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 12:24:13,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:24:13,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 12:24:13,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 12:24:14,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:24:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 27 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:24:14,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453945573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:24:14,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:24:14,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 56 [2022-11-16 12:24:14,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881105045] [2022-11-16 12:24:14,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:24:14,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 12:24:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 12:24:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2801, Unknown=1, NotChecked=106, Total=3080 [2022-11-16 12:24:14,294 INFO L87 Difference]: Start difference. First operand 653 states and 718 transitions. Second operand has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:16,924 INFO L93 Difference]: Finished difference Result 761 states and 829 transitions. [2022-11-16 12:24:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 12:24:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 56 states have internal predecessors, (143), 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 70 [2022-11-16 12:24:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:16,927 INFO L225 Difference]: With dead ends: 761 [2022-11-16 12:24:16,928 INFO L226 Difference]: Without dead ends: 709 [2022-11-16 12:24:16,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=380, Invalid=5475, Unknown=1, NotChecked=150, Total=6006 [2022-11-16 12:24:16,929 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 186 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:16,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1228 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1848 Invalid, 0 Unknown, 63 Unchecked, 1.4s Time] [2022-11-16 12:24:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-16 12:24:16,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 662. [2022-11-16 12:24:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 658 states have (on average 1.1048632218844985) internal successors, (727), 661 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 727 transitions. [2022-11-16 12:24:16,938 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 727 transitions. Word has length 70 [2022-11-16 12:24:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:16,938 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 727 transitions. [2022-11-16 12:24:16,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:24:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 727 transitions. [2022-11-16 12:24:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 12:24:16,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:16,940 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:24:16,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:17,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:17,147 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:24:17,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2038398780, now seen corresponding path program 8 times [2022-11-16 12:24:17,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:17,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948217653] [2022-11-16 12:24:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:24:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 83 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:24:24,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:24:24,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948217653] [2022-11-16 12:24:24,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948217653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:24:24,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474128884] [2022-11-16 12:24:24,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:24:24,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:24:24,383 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:24:24,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 12:24:24,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:24:24,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:24:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-16 12:24:24,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:24:24,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:24:26,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:24:26,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:26:02,263 INFO L321 Elim1Store]: treesize reduction 39, result has 57.1 percent of original size [2022-11-16 12:26:02,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 101 treesize of output 90 [2022-11-16 12:26:02,270 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-16 12:26:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 56 proven. 161 refuted. 35 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:26:02,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:26:08,068 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1811 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1811) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= 0 (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-11-16 12:26:08,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:26:08,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 121 [2022-11-16 12:26:08,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:26:08,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 236 treesize of output 264 [2022-11-16 12:26:08,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:26:08,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 98 treesize of output 64 [2022-11-16 12:26:13,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:26:13,919 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-11-16 12:26:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 99 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:26:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474128884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:26:14,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:26:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 86 [2022-11-16 12:26:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172686953] [2022-11-16 12:26:14,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:26:14,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-16 12:26:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:26:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-16 12:26:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=6458, Unknown=54, NotChecked=166, Total=7310 [2022-11-16 12:26:14,146 INFO L87 Difference]: Start difference. First operand 662 states and 727 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 86 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:27:32,108 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 60 DAG size of output: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:27:59,912 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 65 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:28:50,757 WARN L233 SmtUtils]: Spent 7.32s on a formula simplification. DAG size of input: 71 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:28:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:50,849 INFO L93 Difference]: Finished difference Result 876 states and 964 transitions. [2022-11-16 12:28:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 12:28:50,850 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 86 states have internal predecessors, (180), 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 70 [2022-11-16 12:28:50,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:50,851 INFO L225 Difference]: With dead ends: 876 [2022-11-16 12:28:50,852 INFO L226 Difference]: Without dead ends: 824 [2022-11-16 12:28:50,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4741 ImplicationChecksByTransitivity, 263.0s TimeCoverageRelationStatistics Valid=1838, Invalid=15613, Unknown=109, NotChecked=262, Total=17822 [2022-11-16 12:28:50,853 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 695 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:50,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 765 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1003 Invalid, 0 Unknown, 292 Unchecked, 1.5s Time] [2022-11-16 12:28:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-11-16 12:28:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 691. [2022-11-16 12:28:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 687 states have (on average 1.1062590975254731) internal successors, (760), 690 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 760 transitions. [2022-11-16 12:28:50,862 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 760 transitions. Word has length 70 [2022-11-16 12:28:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:50,862 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 760 transitions. [2022-11-16 12:28:50,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 86 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:28:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 760 transitions. [2022-11-16 12:28:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 12:28:50,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:50,865 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 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] [2022-11-16 12:28:50,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:51,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-16 12:28:51,075 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:28:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1793850028, now seen corresponding path program 6 times [2022-11-16 12:28:51,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:51,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903434262] [2022-11-16 12:28:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:51,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:28:56,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:56,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903434262] [2022-11-16 12:28:56,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903434262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:56,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396872225] [2022-11-16 12:28:56,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:28:56,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:56,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:56,242 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:56,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-16 12:28:56,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-16 12:28:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:28:56,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-16 12:28:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:56,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:28:58,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:28:58,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 12:29:00,157 INFO L321 Elim1Store]: treesize reduction 8, result has 74.2 percent of original size [2022-11-16 12:29:00,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 37 [2022-11-16 12:29:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 7 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:00,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:02,299 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1874 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1874) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) (= (mod (+ |c_ULTIMATE.start_main_~n~0#1| 4294967295) 4294967296) 0)) is different from false [2022-11-16 12:29:02,313 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:29:02,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2022-11-16 12:29:02,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:29:02,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 90 treesize of output 92 [2022-11-16 12:29:02,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:29:02,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 22 [2022-11-16 12:29:05,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:29:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 28 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:05,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396872225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:05,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:29:05,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 27] total 82 [2022-11-16 12:29:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073739767] [2022-11-16 12:29:05,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:05,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 12:29:05,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 12:29:05,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=6001, Unknown=1, NotChecked=158, Total=6642 [2022-11-16 12:29:05,740 INFO L87 Difference]: Start difference. First operand 691 states and 760 transitions. Second operand has 82 states, 82 states have (on average 2.3292682926829267) internal successors, (191), 82 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:24,274 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:29:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:24,660 INFO L93 Difference]: Finished difference Result 809 states and 882 transitions. [2022-11-16 12:29:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 12:29:24,660 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.3292682926829267) internal successors, (191), 82 states have internal predecessors, (191), 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 70 [2022-11-16 12:29:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:24,662 INFO L225 Difference]: With dead ends: 809 [2022-11-16 12:29:24,662 INFO L226 Difference]: Without dead ends: 779 [2022-11-16 12:29:24,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=1553, Invalid=12970, Unknown=1, NotChecked=238, Total=14762 [2022-11-16 12:29:24,663 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 489 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:24,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 960 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1412 Invalid, 0 Unknown, 291 Unchecked, 2.1s Time] [2022-11-16 12:29:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-16 12:29:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 689. [2022-11-16 12:29:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.1065693430656933) internal successors, (758), 688 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 758 transitions. [2022-11-16 12:29:24,674 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 758 transitions. Word has length 70 [2022-11-16 12:29:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:24,674 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 758 transitions. [2022-11-16 12:29:24,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.3292682926829267) internal successors, (191), 82 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 758 transitions. [2022-11-16 12:29:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 12:29:24,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:24,677 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:24,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-16 12:29:24,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-16 12:29:24,888 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:29:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1319370477, now seen corresponding path program 7 times [2022-11-16 12:29:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:24,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855967582] [2022-11-16 12:29:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:29:25,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:25,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855967582] [2022-11-16 12:29:25,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855967582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:25,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045033893] [2022-11-16 12:29:25,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:29:25,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:25,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:25,473 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:25,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-16 12:29:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 12:29:25,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:29:26,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:29:27,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045033893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:27,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:29:27,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-11-16 12:29:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029431194] [2022-11-16 12:29:27,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 12:29:27,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 12:29:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:29:27,329 INFO L87 Difference]: Start difference. First operand 689 states and 758 transitions. Second operand has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:29,358 INFO L93 Difference]: Finished difference Result 927 states and 1002 transitions. [2022-11-16 12:29:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 12:29:29,359 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 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 72 [2022-11-16 12:29:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:29,363 INFO L225 Difference]: With dead ends: 927 [2022-11-16 12:29:29,363 INFO L226 Difference]: Without dead ends: 927 [2022-11-16 12:29:29,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1423, Invalid=4739, Unknown=0, NotChecked=0, Total=6162 [2022-11-16 12:29:29,364 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 831 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:29,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 654 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:29:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-11-16 12:29:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 814. [2022-11-16 12:29:29,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 810 states have (on average 1.1037037037037036) internal successors, (894), 813 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 894 transitions. [2022-11-16 12:29:29,373 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 894 transitions. Word has length 72 [2022-11-16 12:29:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:29,374 INFO L495 AbstractCegarLoop]: Abstraction has 814 states and 894 transitions. [2022-11-16 12:29:29,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 894 transitions. [2022-11-16 12:29:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 12:29:29,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:29,377 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:29,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:29,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:29,578 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:29:29,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1662559008, now seen corresponding path program 5 times [2022-11-16 12:29:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:29,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746685871] [2022-11-16 12:29:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:29:30,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746685871] [2022-11-16 12:29:30,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746685871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316738923] [2022-11-16 12:29:30,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:29:30,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:30,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:30,145 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:30,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 12:29:30,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 12:29:30,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:29:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 12:29:30,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:31,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:29:31,733 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-11-16 12:29:31,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 32 treesize of output 42 [2022-11-16 12:29:31,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:29:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:29:31,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-11-16 12:29:32,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-16 12:29:32,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-16 12:29:32,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:29:32,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:29:32,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:29:32,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-11-16 12:29:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:29:32,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:32,670 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2007 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2007) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|))) is different from false [2022-11-16 12:29:32,680 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2007 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2007) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 12:29:32,709 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2007 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_2007) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 2)) 0)) is different from false [2022-11-16 12:29:33,525 INFO L321 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-11-16 12:29:33,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 87 [2022-11-16 12:29:33,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:29:33,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2022-11-16 12:29:33,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:29:33,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-16 12:29:33,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:29:33,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2022-11-16 12:29:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 24 not checked. [2022-11-16 12:29:34,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316738923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:34,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:29:34,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 22] total 58 [2022-11-16 12:29:34,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528348835] [2022-11-16 12:29:34,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:34,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 12:29:34,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 12:29:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2751, Unknown=30, NotChecked=324, Total=3306 [2022-11-16 12:29:34,443 INFO L87 Difference]: Start difference. First operand 814 states and 894 transitions. Second operand has 58 states, 58 states have (on average 2.7758620689655173) internal successors, (161), 58 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:43,367 INFO L93 Difference]: Finished difference Result 1066 states and 1154 transitions. [2022-11-16 12:29:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-16 12:29:43,367 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.7758620689655173) internal successors, (161), 58 states have internal predecessors, (161), 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 73 [2022-11-16 12:29:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:43,371 INFO L225 Difference]: With dead ends: 1066 [2022-11-16 12:29:43,371 INFO L226 Difference]: Without dead ends: 954 [2022-11-16 12:29:43,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5963 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1717, Invalid=19431, Unknown=34, NotChecked=870, Total=22052 [2022-11-16 12:29:43,372 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 576 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1177 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:43,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 628 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 868 Invalid, 0 Unknown, 1177 Unchecked, 0.8s Time] [2022-11-16 12:29:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-16 12:29:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 831. [2022-11-16 12:29:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 827 states have (on average 1.1039903264812576) internal successors, (913), 830 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 913 transitions. [2022-11-16 12:29:43,381 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 913 transitions. Word has length 73 [2022-11-16 12:29:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:43,381 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 913 transitions. [2022-11-16 12:29:43,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.7758620689655173) internal successors, (161), 58 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:29:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 913 transitions. [2022-11-16 12:29:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 12:29:43,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:43,383 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:43,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:43,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:43,584 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:29:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2036425335, now seen corresponding path program 11 times [2022-11-16 12:29:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:43,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071806445] [2022-11-16 12:29:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:43,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:29:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:45,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071806445] [2022-11-16 12:29:45,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071806445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:29:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038183451] [2022-11-16 12:29:45,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:29:45,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:45,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:45,049 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-16 12:29:45,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-16 12:29:45,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:29:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 12:29:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:46,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 12:29:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:29:47,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-16 12:29:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:29:48,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:29:48,977 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 12:29:48,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-11-16 12:29:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 10 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:49,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:50,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-16 12:29:50,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:29:50,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2022-11-16 12:29:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 12 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:29:52,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038183451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:52,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:29:52,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32, 30] total 86 [2022-11-16 12:29:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002282625] [2022-11-16 12:29:52,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:52,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-16 12:29:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-16 12:29:52,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=7013, Unknown=0, NotChecked=0, Total=7310 [2022-11-16 12:29:52,903 INFO L87 Difference]: Start difference. First operand 831 states and 913 transitions. Second operand has 86 states, 86 states have (on average 2.4767441860465116) internal successors, (213), 86 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:28,261 INFO L93 Difference]: Finished difference Result 1935 states and 2065 transitions. [2022-11-16 12:30:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-11-16 12:30:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.4767441860465116) internal successors, (213), 86 states have internal predecessors, (213), 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 74 [2022-11-16 12:30:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:28,267 INFO L225 Difference]: With dead ends: 1935 [2022-11-16 12:30:28,267 INFO L226 Difference]: Without dead ends: 1829 [2022-11-16 12:30:28,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16709 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=5268, Invalid=57482, Unknown=0, NotChecked=0, Total=62750 [2022-11-16 12:30:28,272 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1316 mSDsluCounter, 6252 mSDsCounter, 0 mSdLazyCounter, 7934 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 6379 SdHoareTripleChecker+Invalid, 10139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 7934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2165 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:28,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1316 Valid, 6379 Invalid, 10139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [40 Valid, 7934 Invalid, 0 Unknown, 2165 Unchecked, 6.6s Time] [2022-11-16 12:30:28,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-11-16 12:30:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 876. [2022-11-16 12:30:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 872 states have (on average 1.1009174311926606) internal successors, (960), 875 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 960 transitions. [2022-11-16 12:30:28,290 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 960 transitions. Word has length 74 [2022-11-16 12:30:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:28,291 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 960 transitions. [2022-11-16 12:30:28,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.4767441860465116) internal successors, (213), 86 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:28,291 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 960 transitions. [2022-11-16 12:30:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 12:30:28,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:28,293 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:28,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:28,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-16 12:30:28,500 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:30:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash 899715448, now seen corresponding path program 1 times [2022-11-16 12:30:28,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:28,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242983801] [2022-11-16 12:30:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:28,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:30:29,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:29,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242983801] [2022-11-16 12:30:29,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242983801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:29,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726488223] [2022-11-16 12:30:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:29,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:29,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:29,183 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:29,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-16 12:30:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:29,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:30:29,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:30:30,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:30:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:30:31,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726488223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:30:31,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:30:31,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2022-11-16 12:30:31,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561876184] [2022-11-16 12:30:31,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:30:31,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 12:30:31,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:30:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 12:30:31,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 12:30:31,927 INFO L87 Difference]: Start difference. First operand 876 states and 960 transitions. Second operand has 46 states, 46 states have (on average 3.369565217391304) internal successors, (155), 46 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:30:34,524 INFO L93 Difference]: Finished difference Result 929 states and 1004 transitions. [2022-11-16 12:30:34,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:30:34,525 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.369565217391304) internal successors, (155), 46 states have internal predecessors, (155), 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 74 [2022-11-16 12:30:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:30:34,526 INFO L225 Difference]: With dead ends: 929 [2022-11-16 12:30:34,527 INFO L226 Difference]: Without dead ends: 867 [2022-11-16 12:30:34,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1180, Invalid=4826, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 12:30:34,527 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 826 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:30:34,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 587 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 12:30:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-11-16 12:30:34,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 766. [2022-11-16 12:30:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 762 states have (on average 1.1023622047244095) internal successors, (840), 765 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 840 transitions. [2022-11-16 12:30:34,538 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 840 transitions. Word has length 74 [2022-11-16 12:30:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:30:34,538 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 840 transitions. [2022-11-16 12:30:34,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.369565217391304) internal successors, (155), 46 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:30:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 840 transitions. [2022-11-16 12:30:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 12:30:34,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:30:34,540 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:30:34,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-16 12:30:34,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-16 12:30:34,747 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-16 12:30:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:30:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1577241536, now seen corresponding path program 9 times [2022-11-16 12:30:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:30:34,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329075434] [2022-11-16 12:30:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:30:34,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:30:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:30:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 102 proven. 208 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:30:41,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:30:41,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329075434] [2022-11-16 12:30:41,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329075434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:30:41,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134385279] [2022-11-16 12:30:41,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:30:41,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:30:41,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:30:41,983 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:30:41,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44940607-a0bf-444b-9c1d-c001bf749f21/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 12:30:42,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-16 12:30:42,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:30:42,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-16 12:30:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:30:42,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8