./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/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_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-5e519f3 [2022-11-02 20:25:23,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:25:23,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:25:24,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:25:24,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:25:24,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:25:24,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:25:24,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:25:24,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:25:24,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:25:24,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:25:24,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:25:24,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:25:24,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:25:24,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:25:24,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:25:24,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:25:24,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:25:24,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:25:24,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:25:24,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:25:24,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:25:24,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:25:24,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:25:24,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:25:24,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:25:24,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:25:24,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:25:24,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:25:24,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:25:24,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:25:24,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:25:24,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:25:24,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:25:24,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:25:24,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:25:24,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:25:24,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:25:24,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:25:24,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:25:24,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:25:24,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:25:24,171 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:25:24,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:25:24,172 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:25:24,172 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:25:24,173 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:25:24,173 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:25:24,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:25:24,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:25:24,175 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:25:24,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:25:24,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:25:24,175 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:25:24,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:25:24,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:25:24,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:25:24,176 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:25:24,177 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:25:24,177 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:25:24,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:25:24,178 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:25:24,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:25:24,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:25:24,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:25:24,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:25:24,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:25:24,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:25:24,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:25:24,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:25:24,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:25:24,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:25:24,181 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_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2022-11-02 20:25:24,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:25:24,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:25:24,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:25:24,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:25:24,626 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:25:24,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-11-02 20:25:24,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/data/bcb0f0a83/f4d61bfd055d4825be0b6c1853c8e249/FLAGa79a0a02b [2022-11-02 20:25:25,538 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:25:25,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-11-02 20:25:25,553 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/data/bcb0f0a83/f4d61bfd055d4825be0b6c1853c8e249/FLAGa79a0a02b [2022-11-02 20:25:25,747 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/data/bcb0f0a83/f4d61bfd055d4825be0b6c1853c8e249 [2022-11-02 20:25:25,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:25:25,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:25:25,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:25:25,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:25:25,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:25:25,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:25:25" (1/1) ... [2022-11-02 20:25:25,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6de949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:25, skipping insertion in model container [2022-11-02 20:25:25,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:25:25" (1/1) ... [2022-11-02 20:25:25,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:25:25,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:25:26,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:25:26,403 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:25:26,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:25:26,534 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:25:26,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26 WrapperNode [2022-11-02 20:25:26,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:25:26,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:25:26,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:25:26,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:25:26,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,604 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-11-02 20:25:26,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:25:26,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:25:26,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:25:26,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:25:26,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,667 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:25:26,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:25:26,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:25:26,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:25:26,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (1/1) ... [2022-11-02 20:25:26,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:25:26,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:26,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:25:26,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:25:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:25:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:25:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:25:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:25:26,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:25:26,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:25:26,977 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:25:26,980 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:25:27,469 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:25:27,478 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:25:27,478 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:25:27,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:25:27 BoogieIcfgContainer [2022-11-02 20:25:27,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:25:27,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:25:27,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:25:27,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:25:27,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:25:25" (1/3) ... [2022-11-02 20:25:27,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f17ee20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:25:27, skipping insertion in model container [2022-11-02 20:25:27,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:25:26" (2/3) ... [2022-11-02 20:25:27,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f17ee20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:25:27, skipping insertion in model container [2022-11-02 20:25:27,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:25:27" (3/3) ... [2022-11-02 20:25:27,505 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2022-11-02 20:25:27,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:25:27,536 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-11-02 20:25:27,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:25:27,640 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;@9dae62f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:25:27,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-02 20:25:27,650 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) [2022-11-02 20:25:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:25:27,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:27,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:27,667 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)] === [2022-11-02 20:25:27,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031113, now seen corresponding path program 1 times [2022-11-02 20:25:27,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:27,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296680377] [2022-11-02 20:25:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:27,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:27,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296680377] [2022-11-02 20:25:27,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296680377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:27,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:27,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:25:28,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660561934] [2022-11-02 20:25:28,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:28,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:25:28,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:28,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:25:28,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:25:28,082 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) [2022-11-02 20:25:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:28,199 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-02 20:25:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:25:28,202 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 [2022-11-02 20:25:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:28,213 INFO L225 Difference]: With dead ends: 51 [2022-11-02 20:25:28,213 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 20:25:28,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:25:28,220 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 [2022-11-02 20:25:28,221 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] [2022-11-02 20:25:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 20:25:28,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-02 20:25:28,263 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) [2022-11-02 20:25:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-02 20:25:28,266 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 7 [2022-11-02 20:25:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:28,267 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-02 20:25:28,267 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) [2022-11-02 20:25:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-02 20:25:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:25:28,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:28,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:28,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:25:28,269 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)] === [2022-11-02 20:25:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-11-02 20:25:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:28,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939039774] [2022-11-02 20:25:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:28,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:28,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:28,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939039774] [2022-11-02 20:25:28,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939039774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:28,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:28,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:25:28,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25062177] [2022-11-02 20:25:28,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:28,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:25:28,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:28,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:25:28,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:25:28,415 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) [2022-11-02 20:25:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:28,513 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-02 20:25:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:25:28,514 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 [2022-11-02 20:25:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:28,515 INFO L225 Difference]: With dead ends: 51 [2022-11-02 20:25:28,515 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 20:25:28,516 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 [2022-11-02 20:25:28,518 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 [2022-11-02 20:25:28,519 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] [2022-11-02 20:25:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 20:25:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-02 20:25:28,525 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) [2022-11-02 20:25:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-02 20:25:28,526 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2022-11-02 20:25:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:28,527 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-02 20:25:28,527 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) [2022-11-02 20:25:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-02 20:25:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:25:28,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:28,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:28,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:25:28,533 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)] === [2022-11-02 20:25:28,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-11-02 20:25:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:28,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053140162] [2022-11-02 20:25:28,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:28,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:28,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053140162] [2022-11-02 20:25:28,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053140162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:28,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:28,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:25:28,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506715142] [2022-11-02 20:25:28,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:28,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:25:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:25:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:25:28,759 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) [2022-11-02 20:25:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:28,805 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-02 20:25:28,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:25:28,806 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 [2022-11-02 20:25:28,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:28,807 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:25:28,807 INFO L226 Difference]: Without dead ends: 46 [2022-11-02 20:25:28,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:25:28,810 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 [2022-11-02 20:25:28,810 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] [2022-11-02 20:25:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-02 20:25:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-02 20:25:28,815 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) [2022-11-02 20:25:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-02 20:25:28,817 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 8 [2022-11-02 20:25:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:28,817 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-02 20:25:28,818 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) [2022-11-02 20:25:28,818 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-02 20:25:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:25:28,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:28,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:28,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:25:28,819 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)] === [2022-11-02 20:25:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-11-02 20:25:28,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:28,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851785990] [2022-11-02 20:25:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:29,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851785990] [2022-11-02 20:25:29,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851785990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:29,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:29,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:25:29,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684748201] [2022-11-02 20:25:29,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:29,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:25:29,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:29,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:25:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:25:29,232 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) [2022-11-02 20:25:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:29,443 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-02 20:25:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:25:29,444 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 [2022-11-02 20:25:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:29,445 INFO L225 Difference]: With dead ends: 50 [2022-11-02 20:25:29,446 INFO L226 Difference]: Without dead ends: 50 [2022-11-02 20:25:29,448 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 [2022-11-02 20:25:29,459 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 104 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:29,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 98 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:25:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-02 20:25:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-11-02 20:25:29,465 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) [2022-11-02 20:25:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-02 20:25:29,466 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2022-11-02 20:25:29,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:29,467 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-02 20:25:29,467 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) [2022-11-02 20:25:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-02 20:25:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:25:29,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:29,468 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:29,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:25:29,472 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)] === [2022-11-02 20:25:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-11-02 20:25:29,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:29,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197438571] [2022-11-02 20:25:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:29,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:30,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197438571] [2022-11-02 20:25:30,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197438571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41187944] [2022-11-02 20:25:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:30,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:30,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:30,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:30,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:25:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:25:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:30,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:30,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:25:30,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:25:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:30,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:30,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:25:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:30,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41187944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:30,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:30,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-11-02 20:25:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594385395] [2022-11-02 20:25:30,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:30,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:25:30,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:30,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:25:30,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:25:30,980 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) [2022-11-02 20:25:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:31,392 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-11-02 20:25:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:25:31,393 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 [2022-11-02 20:25:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:31,394 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:25:31,394 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:25:31,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:25:31,396 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 [2022-11-02 20:25:31,397 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] [2022-11-02 20:25:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:25:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 46. [2022-11-02 20:25:31,401 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) [2022-11-02 20:25:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-02 20:25:31,403 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2022-11-02 20:25:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:31,403 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-02 20:25:31,404 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) [2022-11-02 20:25:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-02 20:25:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:25:31,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:31,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:31,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:25:31,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:31,633 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)] === [2022-11-02 20:25:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash 840060780, now seen corresponding path program 1 times [2022-11-02 20:25:31,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:31,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510563987] [2022-11-02 20:25:31,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:31,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:31,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510563987] [2022-11-02 20:25:31,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510563987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020697927] [2022-11-02 20:25:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:31,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:31,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:31,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:31,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:25:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:31,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:25:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:32,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:25:32,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020697927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:32,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:25:32,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-11-02 20:25:32,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572104999] [2022-11-02 20:25:32,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:32,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:25:32,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:25:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:25:32,263 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) [2022-11-02 20:25:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:32,459 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-02 20:25:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:25:32,460 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 [2022-11-02 20:25:32,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:32,461 INFO L225 Difference]: With dead ends: 45 [2022-11-02 20:25:32,461 INFO L226 Difference]: Without dead ends: 45 [2022-11-02 20:25:32,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:25:32,462 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 163 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:32,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 63 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:25:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-02 20:25:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-02 20:25:32,467 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) [2022-11-02 20:25:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-02 20:25:32,468 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2022-11-02 20:25:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:32,469 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-02 20:25:32,469 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) [2022-11-02 20:25:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-02 20:25:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:25:32,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:32,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:32,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:32,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:32,671 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)] === [2022-11-02 20:25:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 840060832, now seen corresponding path program 1 times [2022-11-02 20:25:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:32,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801099598] [2022-11-02 20:25:32,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:32,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:32,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:32,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801099598] [2022-11-02 20:25:32,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801099598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:32,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:32,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:25:32,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156640843] [2022-11-02 20:25:32,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:25:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:25:32,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:25:32,726 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) [2022-11-02 20:25:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:32,748 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-11-02 20:25:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:25:32,749 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 [2022-11-02 20:25:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:32,750 INFO L225 Difference]: With dead ends: 81 [2022-11-02 20:25:32,750 INFO L226 Difference]: Without dead ends: 81 [2022-11-02 20:25:32,751 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 [2022-11-02 20:25:32,752 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 [2022-11-02 20:25:32,752 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] [2022-11-02 20:25:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-02 20:25:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-11-02 20:25:32,757 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) [2022-11-02 20:25:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-11-02 20:25:32,758 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2022-11-02 20:25:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:32,758 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-11-02 20:25:32,759 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) [2022-11-02 20:25:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-11-02 20:25:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:25:32,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:32,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:32,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:25:32,760 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)] === [2022-11-02 20:25:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125410, now seen corresponding path program 1 times [2022-11-02 20:25:32,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:32,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85390272] [2022-11-02 20:25:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:32,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:32,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:32,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85390272] [2022-11-02 20:25:32,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85390272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:32,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:32,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:25:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220251685] [2022-11-02 20:25:32,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:32,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:25:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:25:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:25:32,808 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) [2022-11-02 20:25:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:32,838 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-11-02 20:25:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:25:32,839 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 [2022-11-02 20:25:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:32,840 INFO L225 Difference]: With dead ends: 52 [2022-11-02 20:25:32,840 INFO L226 Difference]: Without dead ends: 52 [2022-11-02 20:25:32,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:25:32,841 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 [2022-11-02 20:25:32,841 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] [2022-11-02 20:25:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-02 20:25:32,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-02 20:25:32,845 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) [2022-11-02 20:25:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-11-02 20:25:32,846 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2022-11-02 20:25:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:32,846 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-11-02 20:25:32,846 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) [2022-11-02 20:25:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-11-02 20:25:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:25:32,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:32,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:32,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:25:32,848 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)] === [2022-11-02 20:25:32,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2022-11-02 20:25:32,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:32,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803745707] [2022-11-02 20:25:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:32,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:32,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803745707] [2022-11-02 20:25:32,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803745707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:32,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922209116] [2022-11-02 20:25:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:32,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:32,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:32,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:32,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:25:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:25:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:33,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:33,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922209116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:33,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:33,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-02 20:25:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256743329] [2022-11-02 20:25:33,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:33,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:25:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:25:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:25:33,223 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) [2022-11-02 20:25:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:33,523 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2022-11-02 20:25:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:25:33,523 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 [2022-11-02 20:25:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:33,526 INFO L225 Difference]: With dead ends: 122 [2022-11-02 20:25:33,527 INFO L226 Difference]: Without dead ends: 122 [2022-11-02 20:25:33,527 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 [2022-11-02 20:25:33,530 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 381 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:33,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 239 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:25:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-02 20:25:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 56. [2022-11-02 20:25:33,540 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) [2022-11-02 20:25:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-02 20:25:33,541 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 14 [2022-11-02 20:25:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:33,541 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-02 20:25:33,541 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) [2022-11-02 20:25:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-02 20:25:33,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:25:33,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:33,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:33,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:33,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:33,744 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)] === [2022-11-02 20:25:33,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:33,744 INFO L85 PathProgramCache]: Analyzing trace with hash 272080408, now seen corresponding path program 1 times [2022-11-02 20:25:33,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:33,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117748221] [2022-11-02 20:25:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:33,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:33,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:33,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117748221] [2022-11-02 20:25:33,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117748221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:33,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:33,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:25:33,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954235207] [2022-11-02 20:25:33,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:33,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:25:33,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:25:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:25:33,909 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) [2022-11-02 20:25:33,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:33,958 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-02 20:25:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:25:33,959 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 [2022-11-02 20:25:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:33,960 INFO L225 Difference]: With dead ends: 83 [2022-11-02 20:25:33,960 INFO L226 Difference]: Without dead ends: 83 [2022-11-02 20:25:33,960 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 [2022-11-02 20:25:33,961 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 [2022-11-02 20:25:33,962 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] [2022-11-02 20:25:33,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-02 20:25:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2022-11-02 20:25:33,965 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) [2022-11-02 20:25:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-02 20:25:33,966 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 15 [2022-11-02 20:25:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:33,967 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-02 20:25:33,967 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) [2022-11-02 20:25:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-02 20:25:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:25:33,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:33,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:33,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:25:33,969 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)] === [2022-11-02 20:25:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:33,970 INFO L85 PathProgramCache]: Analyzing trace with hash 530245846, now seen corresponding path program 1 times [2022-11-02 20:25:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:33,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822349304] [2022-11-02 20:25:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:33,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:34,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:34,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822349304] [2022-11-02 20:25:34,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822349304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:34,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700525374] [2022-11-02 20:25:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:34,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:34,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:34,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:34,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:25:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:25:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:34,537 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:25:34,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:25:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:34,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:25:34,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700525374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:34,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:25:34,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-02 20:25:34,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768997290] [2022-11-02 20:25:34,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:34,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:25:34,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:34,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:25:34,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:25:34,688 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) [2022-11-02 20:25:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:34,726 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-11-02 20:25:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:25:34,727 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 [2022-11-02 20:25:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:34,728 INFO L225 Difference]: With dead ends: 59 [2022-11-02 20:25:34,728 INFO L226 Difference]: Without dead ends: 59 [2022-11-02 20:25:34,729 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 [2022-11-02 20:25:34,730 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 [2022-11-02 20:25:34,730 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] [2022-11-02 20:25:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-02 20:25:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-11-02 20:25:34,744 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) [2022-11-02 20:25:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-11-02 20:25:34,745 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 15 [2022-11-02 20:25:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:34,745 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-11-02 20:25:34,745 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) [2022-11-02 20:25:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-11-02 20:25:34,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:25:34,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:34,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:34,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:34,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:34,965 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)] === [2022-11-02 20:25:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash 944154227, now seen corresponding path program 1 times [2022-11-02 20:25:34,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:34,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356522045] [2022-11-02 20:25:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:34,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:35,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:35,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356522045] [2022-11-02 20:25:35,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356522045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:35,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:35,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:25:35,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200241269] [2022-11-02 20:25:35,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:35,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:25:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:35,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:25:35,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:25:35,104 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) [2022-11-02 20:25:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:35,175 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-02 20:25:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:25:35,176 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 [2022-11-02 20:25:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:35,178 INFO L225 Difference]: With dead ends: 54 [2022-11-02 20:25:35,179 INFO L226 Difference]: Without dead ends: 54 [2022-11-02 20:25:35,179 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 [2022-11-02 20:25:35,180 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 59 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:35,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 63 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:25:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-02 20:25:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-11-02 20:25:35,185 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) [2022-11-02 20:25:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-11-02 20:25:35,190 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 18 [2022-11-02 20:25:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:35,191 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-11-02 20:25:35,191 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) [2022-11-02 20:25:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-11-02 20:25:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:25:35,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:35,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:35,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:25:35,197 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)] === [2022-11-02 20:25:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:35,198 INFO L85 PathProgramCache]: Analyzing trace with hash 944154228, now seen corresponding path program 1 times [2022-11-02 20:25:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:35,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571564391] [2022-11-02 20:25:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:35,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:35,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:35,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571564391] [2022-11-02 20:25:35,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571564391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:35,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699688941] [2022-11-02 20:25:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:35,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:35,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:35,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:35,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:25:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:35,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:25:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:35,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:35,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-02 20:25:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:35,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699688941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:35,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:35,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-11-02 20:25:35,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353783731] [2022-11-02 20:25:35,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:35,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:25:35,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:25:35,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:25:35,688 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) [2022-11-02 20:25:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:35,967 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-11-02 20:25:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:25:35,968 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 [2022-11-02 20:25:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:35,969 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:25:35,969 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:25:35,970 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 [2022-11-02 20:25:35,971 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 204 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:35,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 133 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:25:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:25:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2022-11-02 20:25:35,984 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) [2022-11-02 20:25:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-11-02 20:25:35,985 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 18 [2022-11-02 20:25:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:35,985 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-11-02 20:25:35,986 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) [2022-11-02 20:25:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-11-02 20:25:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:25:35,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:35,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:25:36,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:36,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:36,213 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)] === [2022-11-02 20:25:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:36,214 INFO L85 PathProgramCache]: Analyzing trace with hash -907528666, now seen corresponding path program 2 times [2022-11-02 20:25:36,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:36,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414572073] [2022-11-02 20:25:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:36,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:36,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:36,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414572073] [2022-11-02 20:25:36,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414572073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:36,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002209941] [2022-11-02 20:25:36,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:25:36,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:36,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:36,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:36,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:25:36,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-02 20:25:36,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:36,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:25:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:36,624 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:25:36,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:25:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:25:36,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:25:36,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002209941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:36,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:25:36,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2022-11-02 20:25:36,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727047978] [2022-11-02 20:25:36,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:36,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:25:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:36,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:25:36,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:25:36,807 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) [2022-11-02 20:25:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:36,885 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-02 20:25:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:25:36,886 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 [2022-11-02 20:25:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:36,887 INFO L225 Difference]: With dead ends: 56 [2022-11-02 20:25:36,887 INFO L226 Difference]: Without dead ends: 56 [2022-11-02 20:25:36,887 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 [2022-11-02 20:25:36,888 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 69 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:36,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 58 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:25:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-02 20:25:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-02 20:25:36,890 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) [2022-11-02 20:25:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-11-02 20:25:36,891 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 18 [2022-11-02 20:25:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:36,891 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-11-02 20:25:36,891 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) [2022-11-02 20:25:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-11-02 20:25:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:25:36,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:36,894 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] [2022-11-02 20:25:36,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:37,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:25:37,118 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)] === [2022-11-02 20:25:37,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:37,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1095465713, now seen corresponding path program 1 times [2022-11-02 20:25:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:37,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815642242] [2022-11-02 20:25:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:37,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:37,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:37,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815642242] [2022-11-02 20:25:37,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815642242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:37,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:37,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:25:37,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301267551] [2022-11-02 20:25:37,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:37,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:25:37,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:37,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:25:37,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:25:37,220 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) [2022-11-02 20:25:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:37,251 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2022-11-02 20:25:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:25:37,252 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 [2022-11-02 20:25:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:37,253 INFO L225 Difference]: With dead ends: 115 [2022-11-02 20:25:37,253 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 20:25:37,255 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 [2022-11-02 20:25:37,256 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 53 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:37,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 129 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:25:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 20:25:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2022-11-02 20:25:37,259 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) [2022-11-02 20:25:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-11-02 20:25:37,260 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 20 [2022-11-02 20:25:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:37,262 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-11-02 20:25:37,262 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) [2022-11-02 20:25:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-11-02 20:25:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:25:37,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:37,264 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] [2022-11-02 20:25:37,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:25:37,264 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)] === [2022-11-02 20:25:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:37,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1094114349, now seen corresponding path program 1 times [2022-11-02 20:25:37,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:37,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201767162] [2022-11-02 20:25:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:37,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:37,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201767162] [2022-11-02 20:25:37,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201767162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966371004] [2022-11-02 20:25:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:37,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:37,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:37,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:25:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:37,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 20:25:37,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:38,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 20:25:38,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:25:38,226 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-02 20:25:38,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-02 20:25:38,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:25:38,442 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:38,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-11-02 20:25:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:38,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:38,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-02 20:25:38,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-02 20:25:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:38,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966371004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:38,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:38,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2022-11-02 20:25:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158550279] [2022-11-02 20:25:38,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:38,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:25:38,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:25:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:25:38,923 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) [2022-11-02 20:25:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:41,158 INFO L93 Difference]: Finished difference Result 161 states and 184 transitions. [2022-11-02 20:25:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:25:41,159 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 [2022-11-02 20:25:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:41,160 INFO L225 Difference]: With dead ends: 161 [2022-11-02 20:25:41,161 INFO L226 Difference]: Without dead ends: 161 [2022-11-02 20:25:41,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=495, Invalid=2585, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 20:25:41,181 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 263 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:41,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 519 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 384 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2022-11-02 20:25:41,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-02 20:25:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2022-11-02 20:25:41,187 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) [2022-11-02 20:25:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2022-11-02 20:25:41,189 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 20 [2022-11-02 20:25:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:41,189 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2022-11-02 20:25:41,190 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) [2022-11-02 20:25:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2022-11-02 20:25:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:25:41,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:41,191 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] [2022-11-02 20:25:41,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:41,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:25:41,418 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)] === [2022-11-02 20:25:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash 74397359, now seen corresponding path program 1 times [2022-11-02 20:25:41,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:41,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889596393] [2022-11-02 20:25:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:41,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:41,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:41,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889596393] [2022-11-02 20:25:41,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889596393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:41,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:41,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:25:41,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119893054] [2022-11-02 20:25:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:41,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:25:41,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:25:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:25:41,555 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) [2022-11-02 20:25:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:41,587 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2022-11-02 20:25:41,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:25:41,588 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 [2022-11-02 20:25:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:41,589 INFO L225 Difference]: With dead ends: 125 [2022-11-02 20:25:41,589 INFO L226 Difference]: Without dead ends: 125 [2022-11-02 20:25:41,590 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 [2022-11-02 20:25:41,590 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:41,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 73 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:25:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-02 20:25:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 76. [2022-11-02 20:25:41,593 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) [2022-11-02 20:25:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-11-02 20:25:41,594 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 20 [2022-11-02 20:25:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:41,594 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-11-02 20:25:41,595 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) [2022-11-02 20:25:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-11-02 20:25:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:25:41,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:41,599 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] [2022-11-02 20:25:41,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:25:41,600 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)] === [2022-11-02 20:25:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash -442195040, now seen corresponding path program 1 times [2022-11-02 20:25:41,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:41,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038403001] [2022-11-02 20:25:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:41,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:41,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:41,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038403001] [2022-11-02 20:25:41,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038403001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:41,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:41,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:25:41,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151551926] [2022-11-02 20:25:41,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:41,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:25:41,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:41,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:25:41,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:25:41,694 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) [2022-11-02 20:25:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:41,767 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-02 20:25:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:25:41,768 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 [2022-11-02 20:25:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:41,770 INFO L225 Difference]: With dead ends: 75 [2022-11-02 20:25:41,770 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 20:25:41,770 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 [2022-11-02 20:25:41,771 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:41,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 84 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:25:41,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 20:25:41,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-02 20:25:41,777 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) [2022-11-02 20:25:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-11-02 20:25:41,777 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 21 [2022-11-02 20:25:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:41,778 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-11-02 20:25:41,778 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) [2022-11-02 20:25:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-11-02 20:25:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:25:41,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:41,779 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] [2022-11-02 20:25:41,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:25:41,779 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)] === [2022-11-02 20:25:41,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash -442195039, now seen corresponding path program 1 times [2022-11-02 20:25:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:41,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907270370] [2022-11-02 20:25:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:41,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:41,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:41,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907270370] [2022-11-02 20:25:41,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907270370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:41,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:41,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:25:41,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379939928] [2022-11-02 20:25:41,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:41,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:25:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:25:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:25:41,985 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) [2022-11-02 20:25:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:42,142 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-11-02 20:25:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:25:42,143 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 [2022-11-02 20:25:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:42,147 INFO L225 Difference]: With dead ends: 83 [2022-11-02 20:25:42,147 INFO L226 Difference]: Without dead ends: 83 [2022-11-02 20:25:42,147 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 [2022-11-02 20:25:42,148 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 98 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:42,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 101 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:25:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-02 20:25:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2022-11-02 20:25:42,157 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) [2022-11-02 20:25:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2022-11-02 20:25:42,158 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 21 [2022-11-02 20:25:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:42,159 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2022-11-02 20:25:42,160 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) [2022-11-02 20:25:42,160 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2022-11-02 20:25:42,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:25:42,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:42,160 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] [2022-11-02 20:25:42,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:25:42,161 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)] === [2022-11-02 20:25:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1330977111, now seen corresponding path program 2 times [2022-11-02 20:25:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:42,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124385380] [2022-11-02 20:25:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:42,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:42,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124385380] [2022-11-02 20:25:42,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124385380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:42,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198761057] [2022-11-02 20:25:42,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:25:42,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:42,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:42,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:42,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:25:42,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:25:42,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 20:25:42,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:42,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:25:43,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:25:43,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:25:43,409 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:25:43,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:25:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:43,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:43,593 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-11-02 20:25:43,603 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:43,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-02 20:25:43,613 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:43,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-02 20:25:43,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:25:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:43,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198761057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:43,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:43,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2022-11-02 20:25:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043086760] [2022-11-02 20:25:43,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:25:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:25:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1022, Unknown=1, NotChecked=64, Total=1190 [2022-11-02 20:25:43,970 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) [2022-11-02 20:25:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:47,078 INFO L93 Difference]: Finished difference Result 283 states and 317 transitions. [2022-11-02 20:25:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 20:25:47,079 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 [2022-11-02 20:25:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:47,080 INFO L225 Difference]: With dead ends: 283 [2022-11-02 20:25:47,080 INFO L226 Difference]: Without dead ends: 283 [2022-11-02 20:25:47,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=472, Invalid=3820, Unknown=2, NotChecked=128, Total=4422 [2022-11-02 20:25:47,083 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 585 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:47,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1225 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1252 Invalid, 0 Unknown, 238 Unchecked, 1.0s Time] [2022-11-02 20:25:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-02 20:25:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 120. [2022-11-02 20:25:47,087 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) [2022-11-02 20:25:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2022-11-02 20:25:47,088 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 26 [2022-11-02 20:25:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:47,088 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2022-11-02 20:25:47,088 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) [2022-11-02 20:25:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2022-11-02 20:25:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:25:47,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:47,089 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] [2022-11-02 20:25:47,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:47,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:47,293 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)] === [2022-11-02 20:25:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash 803583084, now seen corresponding path program 1 times [2022-11-02 20:25:47,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:47,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058266514] [2022-11-02 20:25:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:47,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:47,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:47,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058266514] [2022-11-02 20:25:47,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058266514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:47,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:47,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:25:47,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965688716] [2022-11-02 20:25:47,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:47,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:25:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:25:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:25:47,468 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) [2022-11-02 20:25:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:47,492 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2022-11-02 20:25:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:25:47,493 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 [2022-11-02 20:25:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:47,494 INFO L225 Difference]: With dead ends: 119 [2022-11-02 20:25:47,494 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 20:25:47,495 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 [2022-11-02 20:25:47,496 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 [2022-11-02 20:25:47,496 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] [2022-11-02 20:25:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 20:25:47,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-02 20:25:47,499 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) [2022-11-02 20:25:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-11-02 20:25:47,500 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 27 [2022-11-02 20:25:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:47,500 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-11-02 20:25:47,500 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) [2022-11-02 20:25:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-11-02 20:25:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:25:47,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:47,501 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] [2022-11-02 20:25:47,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:25:47,502 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)] === [2022-11-02 20:25:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash 805151438, now seen corresponding path program 1 times [2022-11-02 20:25:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:47,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982499210] [2022-11-02 20:25:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:47,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:47,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:47,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982499210] [2022-11-02 20:25:47,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982499210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:25:47,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:25:47,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:25:47,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192406624] [2022-11-02 20:25:47,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:25:47,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:25:47,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:25:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:25:47,639 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) [2022-11-02 20:25:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:47,683 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2022-11-02 20:25:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:25:47,684 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 [2022-11-02 20:25:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:47,685 INFO L225 Difference]: With dead ends: 170 [2022-11-02 20:25:47,685 INFO L226 Difference]: Without dead ends: 137 [2022-11-02 20:25:47,686 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 [2022-11-02 20:25:47,687 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:47,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:25:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-02 20:25:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-11-02 20:25:47,690 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) [2022-11-02 20:25:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2022-11-02 20:25:47,691 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 27 [2022-11-02 20:25:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:47,691 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2022-11-02 20:25:47,691 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) [2022-11-02 20:25:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2022-11-02 20:25:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:25:47,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:47,693 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] [2022-11-02 20:25:47,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-02 20:25:47,693 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)] === [2022-11-02 20:25:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:47,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1000286896, now seen corresponding path program 1 times [2022-11-02 20:25:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:47,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230335068] [2022-11-02 20:25:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:47,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:47,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:47,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230335068] [2022-11-02 20:25:47,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230335068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:47,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754367845] [2022-11-02 20:25:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:47,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:47,903 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:47,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:25:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 20:25:47,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:48,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:25:48,219 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:48,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-02 20:25:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:48,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:48,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-02 20:25:48,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:25:48,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-11-02 20:25:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:48,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754367845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:48,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:48,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-02 20:25:48,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740664440] [2022-11-02 20:25:48,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:48,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:25:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:25:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:25:48,840 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) [2022-11-02 20:25:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:49,367 INFO L93 Difference]: Finished difference Result 164 states and 180 transitions. [2022-11-02 20:25:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:25:49,367 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 [2022-11-02 20:25:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:49,368 INFO L225 Difference]: With dead ends: 164 [2022-11-02 20:25:49,368 INFO L226 Difference]: Without dead ends: 150 [2022-11-02 20:25:49,369 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 [2022-11-02 20:25:49,370 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:49,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 281 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-11-02 20:25:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-02 20:25:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 138. [2022-11-02 20:25:49,373 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) [2022-11-02 20:25:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2022-11-02 20:25:49,374 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 27 [2022-11-02 20:25:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:49,374 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2022-11-02 20:25:49,374 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) [2022-11-02 20:25:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2022-11-02 20:25:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:25:49,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:49,375 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] [2022-11-02 20:25:49,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:49,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:25:49,593 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)] === [2022-11-02 20:25:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash 697237728, now seen corresponding path program 1 times [2022-11-02 20:25:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559956754] [2022-11-02 20:25:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:50,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:50,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559956754] [2022-11-02 20:25:50,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559956754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:50,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249430154] [2022-11-02 20:25:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:50,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:50,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:50,370 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:50,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:25:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 20:25:50,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:50,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:25:50,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 20:25:50,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:25:51,231 INFO L356 Elim1Store]: treesize reduction 14, result has 46.2 percent of original size [2022-11-02 20:25:51,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 22 [2022-11-02 20:25:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:51,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:51,484 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_~d~0#1.offset_30| Int) (v_ArrVal_349 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_349) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |v_ULTIMATE.start_cstrncat_~d~0#1.offset_30| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_30|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncat_~d~0#1.offset_30|) (= (select .cse0 |v_ULTIMATE.start_cstrncat_~d~0#1.offset_30|) 0)))) is different from false [2022-11-02 20:25:51,507 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:51,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 37 [2022-11-02 20:25:51,526 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:51,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 61 treesize of output 67 [2022-11-02 20:25:51,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-02 20:25:52,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:25:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:25:52,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249430154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:52,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:52,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-11-02 20:25:52,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083800256] [2022-11-02 20:25:52,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:52,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:25:52,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:25:52,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=999, Unknown=1, NotChecked=64, Total=1190 [2022-11-02 20:25:52,211 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) [2022-11-02 20:25:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:25:52,913 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2022-11-02 20:25:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:25:52,914 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 [2022-11-02 20:25:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:25:52,915 INFO L225 Difference]: With dead ends: 173 [2022-11-02 20:25:52,915 INFO L226 Difference]: Without dead ends: 173 [2022-11-02 20:25:52,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=251, Invalid=1558, Unknown=1, NotChecked=82, Total=1892 [2022-11-02 20:25:52,916 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:25:52,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 341 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 228 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-11-02 20:25:52,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-02 20:25:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2022-11-02 20:25:52,921 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) [2022-11-02 20:25:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2022-11-02 20:25:52,921 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 28 [2022-11-02 20:25:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:25:52,922 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2022-11-02 20:25:52,922 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) [2022-11-02 20:25:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2022-11-02 20:25:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:25:52,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:25:52,923 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] [2022-11-02 20:25:52,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:25:53,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:25:53,124 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)] === [2022-11-02 20:25:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:25:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1853207525, now seen corresponding path program 3 times [2022-11-02 20:25:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:25:53,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899226289] [2022-11-02 20:25:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:25:53,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:25:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:25:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:53,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:25:53,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899226289] [2022-11-02 20:25:53,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899226289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:25:53,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032380765] [2022-11-02 20:25:53,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:25:53,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:25:53,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:25:53,814 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:25:53,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:25:53,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:25:53,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:25:53,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 20:25:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:25:54,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:25:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:54,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-02 20:25:54,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:25:54,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:25:54,919 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:25:54,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:25:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:54,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:25:57,018 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2022-11-02 20:25:57,028 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:25:57,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 83 [2022-11-02 20:25:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:25:57,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032380765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:25:57,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:25:57,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 45 [2022-11-02 20:25:57,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645925825] [2022-11-02 20:25:57,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:25:57,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-02 20:25:57,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:25:57,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-02 20:25:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1750, Unknown=1, NotChecked=84, Total=1980 [2022-11-02 20:25:57,543 INFO L87 Difference]: Start difference. First operand 161 states and 181 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:26:01,814 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (div |c_ULTIMATE.start_main_~length1~0#1| 4294967296))) (let ((.cse0 (<= .cse1 0))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (not .cse0)) (= |c_ULTIMATE.start_main_~n~0#1| 1) (<= 4 |c_ULTIMATE.start_main_~length1~0#1|) (< 3 |c_ULTIMATE.start_main_~length1~0#1|) (<= |c_ULTIMATE.start_main_~length1~0#1| 4) (= |c_ULTIMATE.start_main_~length2~0#1| 1) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse0 (exists ((|ULTIMATE.start_main_~length1~0#1| Int)) (and (<= |ULTIMATE.start_main_~length1~0#1| 4) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |ULTIMATE.start_main_~length1~0#1| (- 2) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (< 3 |ULTIMATE.start_main_~length1~0#1|))) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (= (+ (* .cse1 4294967296) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) |c_ULTIMATE.start_main_~length1~0#1|) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse2 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse2 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))))))) is different from false [2022-11-02 20:26:03,904 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (div |c_ULTIMATE.start_main_~length1~0#1| 4294967296))) (let ((.cse0 (<= .cse3 0)) (.cse2 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (and (or (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (not .cse0)) (or (= (+ |c_ULTIMATE.start_main_~n~0#1| 3) |c_ULTIMATE.start_main_~length1~0#1|) (= (+ |c_ULTIMATE.start_main_~n~0#1| 1) |c_ULTIMATE.start_main_~length1~0#1|)) (<= 4 |c_ULTIMATE.start_main_~length1~0#1|) (or (< |c_ULTIMATE.start_main_~n~0#1| 2) (< 2 |c_ULTIMATE.start_main_~n~0#1|)) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse1 .cse2) 0))) (< |c_ULTIMATE.start_main_~n~0#1| 4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) .cse0 (< 0 |c_ULTIMATE.start_main_~n~0#1|) (= (+ (* .cse3 4294967296) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) |c_ULTIMATE.start_main_~length1~0#1|) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (let ((.cse4 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~length2~0#1| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse4 .cse2)) (= (select .cse4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0))))))) is different from false [2022-11-02 20:26:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:07,099 INFO L93 Difference]: Finished difference Result 435 states and 469 transitions. [2022-11-02 20:26:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-02 20:26:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 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 [2022-11-02 20:26:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:07,101 INFO L225 Difference]: With dead ends: 435 [2022-11-02 20:26:07,101 INFO L226 Difference]: Without dead ends: 386 [2022-11-02 20:26:07,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1217, Invalid=12598, Unknown=3, NotChecked=702, Total=14520 [2022-11-02 20:26:07,105 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 865 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:07,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 947 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1550 Invalid, 0 Unknown, 282 Unchecked, 1.2s Time] [2022-11-02 20:26:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-02 20:26:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 187. [2022-11-02 20:26:07,111 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) [2022-11-02 20:26:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 209 transitions. [2022-11-02 20:26:07,112 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 209 transitions. Word has length 32 [2022-11-02 20:26:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:07,112 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 209 transitions. [2022-11-02 20:26:07,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:26:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 209 transitions. [2022-11-02 20:26:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:26:07,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:07,113 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] [2022-11-02 20:26:07,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:07,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:07,329 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)] === [2022-11-02 20:26:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1456363364, now seen corresponding path program 2 times [2022-11-02 20:26:07,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:07,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795921267] [2022-11-02 20:26:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:26:08,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:08,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795921267] [2022-11-02 20:26:08,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795921267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:08,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085645977] [2022-11-02 20:26:08,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:26:08,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:08,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:08,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:08,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:26:08,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:26:08,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:08,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-02 20:26:08,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:08,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:08,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 20:26:08,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:26:09,530 INFO L356 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-02 20:26:09,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:26:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:26:09,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:09,902 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 [2022-11-02 20:26:09,913 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:09,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2022-11-02 20:26:09,941 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:09,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:26:09,947 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:09,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 22 [2022-11-02 20:26:10,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:26:10,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085645977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:10,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:10,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-11-02 20:26:10,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980400483] [2022-11-02 20:26:10,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:10,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:26:10,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:10,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:26:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1536, Unknown=1, NotChecked=80, Total=1806 [2022-11-02 20:26:10,754 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) [2022-11-02 20:26:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:11,934 INFO L93 Difference]: Finished difference Result 224 states and 251 transitions. [2022-11-02 20:26:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:26:11,934 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 [2022-11-02 20:26:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:11,936 INFO L225 Difference]: With dead ends: 224 [2022-11-02 20:26:11,936 INFO L226 Difference]: Without dead ends: 224 [2022-11-02 20:26:11,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=403, Invalid=2792, Unknown=1, NotChecked=110, Total=3306 [2022-11-02 20:26:11,938 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 176 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:11,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 278 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 257 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-11-02 20:26:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-02 20:26:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 208. [2022-11-02 20:26:11,942 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) [2022-11-02 20:26:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2022-11-02 20:26:11,943 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 34 [2022-11-02 20:26:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:11,944 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2022-11-02 20:26:11,944 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) [2022-11-02 20:26:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2022-11-02 20:26:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:26:11,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:11,945 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] [2022-11-02 20:26:11,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-02 20:26:12,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:26:12,165 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)] === [2022-11-02 20:26:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1627622054, now seen corresponding path program 2 times [2022-11-02 20:26:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:12,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54819368] [2022-11-02 20:26:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:12,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:12,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54819368] [2022-11-02 20:26:12,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54819368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:12,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965762880] [2022-11-02 20:26:12,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:26:12,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:12,474 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:12,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:26:12,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:26:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:12,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:26:12,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:12,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:26:12,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:26:12,834 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:12,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-11-02 20:26:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:26:12,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:26:12,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965762880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:12,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:26:12,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-11-02 20:26:12,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721096353] [2022-11-02 20:26:12,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:12,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:26:12,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:12,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:26:12,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:26:12,865 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) [2022-11-02 20:26:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:12,956 INFO L93 Difference]: Finished difference Result 269 states and 298 transitions. [2022-11-02 20:26:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:26:12,956 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 [2022-11-02 20:26:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:12,957 INFO L225 Difference]: With dead ends: 269 [2022-11-02 20:26:12,957 INFO L226 Difference]: Without dead ends: 231 [2022-11-02 20:26:12,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:26:12,958 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:12,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 206 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-11-02 20:26:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-02 20:26:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 197. [2022-11-02 20:26:12,963 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) [2022-11-02 20:26:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 221 transitions. [2022-11-02 20:26:12,964 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 221 transitions. Word has length 37 [2022-11-02 20:26:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:12,964 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 221 transitions. [2022-11-02 20:26:12,964 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) [2022-11-02 20:26:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 221 transitions. [2022-11-02 20:26:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:26:12,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:12,966 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] [2022-11-02 20:26:13,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:13,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:26:13,177 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)] === [2022-11-02 20:26:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:13,177 INFO L85 PathProgramCache]: Analyzing trace with hash 423361944, now seen corresponding path program 1 times [2022-11-02 20:26:13,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:13,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592057291] [2022-11-02 20:26:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:13,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592057291] [2022-11-02 20:26:13,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592057291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:13,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282668090] [2022-11-02 20:26:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:13,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:13,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:13,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:26:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:26:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:13,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:26:13,846 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:26:13,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:26:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:26:13,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:26:13,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282668090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:26:13,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:26:13,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 19 [2022-11-02 20:26:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609271953] [2022-11-02 20:26:13,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:26:13,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:26:13,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:26:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:26:13,876 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) [2022-11-02 20:26:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:13,960 INFO L93 Difference]: Finished difference Result 274 states and 305 transitions. [2022-11-02 20:26:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:26:13,961 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 [2022-11-02 20:26:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:13,962 INFO L225 Difference]: With dead ends: 274 [2022-11-02 20:26:13,962 INFO L226 Difference]: Without dead ends: 240 [2022-11-02 20:26:13,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:26:13,963 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:13,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 210 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 75 Unchecked, 0.0s Time] [2022-11-02 20:26:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-02 20:26:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 201. [2022-11-02 20:26:13,967 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) [2022-11-02 20:26:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2022-11-02 20:26:13,967 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 37 [2022-11-02 20:26:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:13,968 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2022-11-02 20:26:13,968 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) [2022-11-02 20:26:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2022-11-02 20:26:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:26:13,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:13,968 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] [2022-11-02 20:26:14,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:14,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:26:14,193 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)] === [2022-11-02 20:26:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:14,193 INFO L85 PathProgramCache]: Analyzing trace with hash 763708385, now seen corresponding path program 4 times [2022-11-02 20:26:14,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:14,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785615122] [2022-11-02 20:26:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:14,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:14,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785615122] [2022-11-02 20:26:14,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785615122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524607665] [2022-11-02 20:26:14,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:26:14,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:14,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:14,909 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:14,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:26:15,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:26:15,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:15,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 20:26:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:15,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:15,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:26:15,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:26:15,855 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:26:15,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:26:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:15,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:16,123 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 [2022-11-02 20:26:16,138 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:16,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-02 20:26:16,148 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:16,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-02 20:26:16,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:16,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524607665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:16,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:16,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 47 [2022-11-02 20:26:16,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839393690] [2022-11-02 20:26:16,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:16,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 20:26:16,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 20:26:16,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1935, Unknown=1, NotChecked=88, Total=2162 [2022-11-02 20:26:16,615 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) [2022-11-02 20:26:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:19,968 INFO L93 Difference]: Finished difference Result 350 states and 385 transitions. [2022-11-02 20:26:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:26:19,968 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 [2022-11-02 20:26:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:19,970 INFO L225 Difference]: With dead ends: 350 [2022-11-02 20:26:19,970 INFO L226 Difference]: Without dead ends: 311 [2022-11-02 20:26:19,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 6 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=556, Invalid=6586, Unknown=2, NotChecked=166, Total=7310 [2022-11-02 20:26:19,972 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 168 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:19,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1418 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1572 Invalid, 0 Unknown, 424 Unchecked, 1.0s Time] [2022-11-02 20:26:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-02 20:26:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 230. [2022-11-02 20:26:19,977 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) [2022-11-02 20:26:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 258 transitions. [2022-11-02 20:26:19,978 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 258 transitions. Word has length 38 [2022-11-02 20:26:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:19,978 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 258 transitions. [2022-11-02 20:26:19,979 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) [2022-11-02 20:26:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 258 transitions. [2022-11-02 20:26:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:26:19,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:19,980 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] [2022-11-02 20:26:20,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:26:20,193 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)] === [2022-11-02 20:26:20,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:20,193 INFO L85 PathProgramCache]: Analyzing trace with hash -910015720, now seen corresponding path program 3 times [2022-11-02 20:26:20,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:20,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084508087] [2022-11-02 20:26:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:26:21,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:21,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084508087] [2022-11-02 20:26:21,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084508087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:21,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825288229] [2022-11-02 20:26:21,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:26:21,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:21,611 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:21,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:26:21,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:26:21,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:21,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-02 20:26:21,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:21,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:22,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 20:26:22,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:26:26,910 INFO L356 Elim1Store]: treesize reduction 19, result has 53.7 percent of original size [2022-11-02 20:26:26,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 40 [2022-11-02 20:26:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 31 refuted. 6 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:26:26,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:28,386 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_567 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_567) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 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 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-11-02 20:26:28,396 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:28,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 61 [2022-11-02 20:26:28,421 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:28,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 119 [2022-11-02 20:26:28,436 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:28,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 29 [2022-11-02 20:26:29,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:26:29,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825288229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:29,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:29,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 51 [2022-11-02 20:26:29,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425022503] [2022-11-02 20:26:29,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:29,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-02 20:26:29,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-02 20:26:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2223, Unknown=10, NotChecked=96, Total=2550 [2022-11-02 20:26:29,487 INFO L87 Difference]: Start difference. First operand 230 states and 258 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:26:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:36,428 INFO L93 Difference]: Finished difference Result 314 states and 349 transitions. [2022-11-02 20:26:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:26:36,429 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 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 [2022-11-02 20:26:36,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:36,430 INFO L225 Difference]: With dead ends: 314 [2022-11-02 20:26:36,430 INFO L226 Difference]: Without dead ends: 300 [2022-11-02 20:26:36,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=555, Invalid=4547, Unknown=14, NotChecked=140, Total=5256 [2022-11-02 20:26:36,432 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 340 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:36,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 426 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 514 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-11-02 20:26:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-02 20:26:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 245. [2022-11-02 20:26:36,438 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) [2022-11-02 20:26:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 276 transitions. [2022-11-02 20:26:36,439 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 276 transitions. Word has length 40 [2022-11-02 20:26:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:36,440 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 276 transitions. [2022-11-02 20:26:36,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:26:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 276 transitions. [2022-11-02 20:26:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:26:36,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:36,441 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] [2022-11-02 20:26:36,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:36,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:36,661 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)] === [2022-11-02 20:26:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2063863029, now seen corresponding path program 1 times [2022-11-02 20:26:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:36,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577627516] [2022-11-02 20:26:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:36,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:26:36,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577627516] [2022-11-02 20:26:36,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577627516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272638258] [2022-11-02 20:26:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:36,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:36,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:36,945 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:36,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:26:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:37,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-02 20:26:37,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:37,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:37,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:26:37,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:26:37,610 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:26:37,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:26:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:37,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:37,693 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|) 0)) is different from false [2022-11-02 20:26:37,701 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 [2022-11-02 20:26:37,715 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_609 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_609) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |c_ULTIMATE.start_cstrncat_~src#1.offset| 1)) 0)) is different from false [2022-11-02 20:26:37,721 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 [2022-11-02 20:26:37,728 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:37,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:26:37,734 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:37,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-02 20:26:38,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-02 20:26:38,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272638258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:38,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:38,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 36 [2022-11-02 20:26:38,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275047021] [2022-11-02 20:26:38,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:26:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:38,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:26:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=883, Unknown=4, NotChecked=252, Total=1260 [2022-11-02 20:26:38,061 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) [2022-11-02 20:26:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:39,712 INFO L93 Difference]: Finished difference Result 292 states and 324 transitions. [2022-11-02 20:26:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:26:39,713 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 [2022-11-02 20:26:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:39,717 INFO L225 Difference]: With dead ends: 292 [2022-11-02 20:26:39,717 INFO L226 Difference]: Without dead ends: 286 [2022-11-02 20:26:39,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=667, Invalid=3767, Unknown=4, NotChecked=532, Total=4970 [2022-11-02 20:26:39,723 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 347 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:39,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 340 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 305 Invalid, 0 Unknown, 315 Unchecked, 0.3s Time] [2022-11-02 20:26:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-02 20:26:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 247. [2022-11-02 20:26:39,734 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) [2022-11-02 20:26:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 278 transitions. [2022-11-02 20:26:39,735 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 278 transitions. Word has length 41 [2022-11-02 20:26:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:39,735 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 278 transitions. [2022-11-02 20:26:39,736 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) [2022-11-02 20:26:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 278 transitions. [2022-11-02 20:26:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:26:39,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:39,737 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] [2022-11-02 20:26:39,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:39,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:39,953 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)] === [2022-11-02 20:26:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1091941255, now seen corresponding path program 1 times [2022-11-02 20:26:39,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:39,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751140792] [2022-11-02 20:26:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:39,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:26:40,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751140792] [2022-11-02 20:26:40,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751140792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:40,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309056164] [2022-11-02 20:26:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:40,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:40,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:40,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:40,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:26:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:40,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-02 20:26:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:40,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:40,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:26:40,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:26:41,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:26:41,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-02 20:26:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:26:41,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:41,199 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 [2022-11-02 20:26:41,392 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:41,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:26:41,399 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:41,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-02 20:26:41,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:26:41,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2022-11-02 20:26:41,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309056164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:41,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:41,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 17] total 39 [2022-11-02 20:26:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594276104] [2022-11-02 20:26:41,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 20:26:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 20:26:41,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1273, Unknown=1, NotChecked=72, Total=1482 [2022-11-02 20:26:41,826 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) [2022-11-02 20:26:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:43,202 INFO L93 Difference]: Finished difference Result 304 states and 334 transitions. [2022-11-02 20:26:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:26:43,202 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 [2022-11-02 20:26:43,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:43,203 INFO L225 Difference]: With dead ends: 304 [2022-11-02 20:26:43,203 INFO L226 Difference]: Without dead ends: 280 [2022-11-02 20:26:43,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=428, Invalid=3481, Unknown=1, NotChecked=122, Total=4032 [2022-11-02 20:26:43,205 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 158 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:43,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 526 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 307 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2022-11-02 20:26:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-02 20:26:43,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 235. [2022-11-02 20:26:43,216 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) [2022-11-02 20:26:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 264 transitions. [2022-11-02 20:26:43,217 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 264 transitions. Word has length 42 [2022-11-02 20:26:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:43,218 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 264 transitions. [2022-11-02 20:26:43,218 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) [2022-11-02 20:26:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 264 transitions. [2022-11-02 20:26:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:26:43,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:43,219 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] [2022-11-02 20:26:43,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:43,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-02 20:26:43,433 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)] === [2022-11-02 20:26:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash 734238365, now seen corresponding path program 5 times [2022-11-02 20:26:43,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:43,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443632704] [2022-11-02 20:26:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:43,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:44,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:44,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443632704] [2022-11-02 20:26:44,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443632704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:44,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248007464] [2022-11-02 20:26:44,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:26:44,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:44,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:44,395 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:44,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:26:44,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-02 20:26:44,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:44,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-02 20:26:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:44,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:44,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:26:45,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:26:45,500 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:26:45,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:26:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:45,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:45,874 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 [2022-11-02 20:26:45,880 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:45,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-02 20:26:45,891 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:45,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-02 20:26:46,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:46,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248007464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:46,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:46,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2022-11-02 20:26:46,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349514992] [2022-11-02 20:26:46,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:46,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-02 20:26:46,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:46,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-02 20:26:46,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2500, Unknown=1, NotChecked=100, Total=2756 [2022-11-02 20:26:46,442 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) [2022-11-02 20:26:52,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:52,718 INFO L93 Difference]: Finished difference Result 497 states and 536 transitions. [2022-11-02 20:26:52,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-02 20:26:52,718 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 [2022-11-02 20:26:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:52,720 INFO L225 Difference]: With dead ends: 497 [2022-11-02 20:26:52,720 INFO L226 Difference]: Without dead ends: 446 [2022-11-02 20:26:52,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 7 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=882, Invalid=9832, Unknown=2, NotChecked=204, Total=10920 [2022-11-02 20:26:52,722 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 493 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 3250 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 3792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 3250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:52,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 2121 Invalid, 3792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 3250 Invalid, 0 Unknown, 450 Unchecked, 1.9s Time] [2022-11-02 20:26:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-02 20:26:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 264. [2022-11-02 20:26:52,728 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) [2022-11-02 20:26:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 295 transitions. [2022-11-02 20:26:52,729 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 295 transitions. Word has length 44 [2022-11-02 20:26:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:52,730 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 295 transitions. [2022-11-02 20:26:52,730 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) [2022-11-02 20:26:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 295 transitions. [2022-11-02 20:26:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:26:52,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:52,731 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] [2022-11-02 20:26:52,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:26:52,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:52,945 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)] === [2022-11-02 20:26:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1097682670, now seen corresponding path program 2 times [2022-11-02 20:26:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:52,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474328280] [2022-11-02 20:26:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:52,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:26:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:53,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474328280] [2022-11-02 20:26:53,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474328280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:53,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442297005] [2022-11-02 20:26:53,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:26:53,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:53,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:53,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:53,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:26:53,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:26:53,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 20:26:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:53,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:53,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:26:53,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:26:53,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:26:54,056 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:54,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-02 20:26:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:26:54,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:26:54,570 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35| Int) (v_ArrVal_742 (Array Int Int))) (or (not (<= |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35| |c_ULTIMATE.start_cstrncat_~s~0#1.offset|)) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35|)) (<= (+ 3 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~s~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_742) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35| 1)) 0))) is different from false [2022-11-02 20:26:54,609 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35| Int) (v_ArrVal_742 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_742) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35|)) (<= (+ 3 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35|) (select |c_#length| |c_ULTIMATE.start_cstrncat_~src#1.base|)) (< |c_ULTIMATE.start_cstrncat_~src#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35|))) is different from false [2022-11-02 20:26:54,634 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35| Int) (v_ArrVal_742 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35|) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35|)) (<= (+ 3 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_742) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_35| 1)) 0))) is different from false [2022-11-02 20:26:54,649 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:54,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:26:54,660 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:26:54,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-02 20:26:54,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:26:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 2 not checked. [2022-11-02 20:26:54,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442297005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:26:54,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:26:54,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-02 20:26:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176164478] [2022-11-02 20:26:54,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:26:54,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-02 20:26:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:26:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-02 20:26:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1286, Unknown=3, NotChecked=222, Total=1640 [2022-11-02 20:26:54,957 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) [2022-11-02 20:26:56,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:26:56,540 INFO L93 Difference]: Finished difference Result 327 states and 358 transitions. [2022-11-02 20:26:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:26:56,541 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 [2022-11-02 20:26:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:26:56,542 INFO L225 Difference]: With dead ends: 327 [2022-11-02 20:26:56,542 INFO L226 Difference]: Without dead ends: 315 [2022-11-02 20:26:56,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=523, Invalid=4598, Unknown=3, NotChecked=426, Total=5550 [2022-11-02 20:26:56,544 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 134 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:26:56,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 340 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 341 Invalid, 0 Unknown, 388 Unchecked, 0.2s Time] [2022-11-02 20:26:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-02 20:26:56,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 264. [2022-11-02 20:26:56,549 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) [2022-11-02 20:26:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 294 transitions. [2022-11-02 20:26:56,550 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 294 transitions. Word has length 45 [2022-11-02 20:26:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:26:56,550 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 294 transitions. [2022-11-02 20:26:56,551 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) [2022-11-02 20:26:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 294 transitions. [2022-11-02 20:26:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:26:56,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:26:56,552 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] [2022-11-02 20:26:56,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-02 20:26:56,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:56,761 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)] === [2022-11-02 20:26:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:26:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1476579412, now seen corresponding path program 4 times [2022-11-02 20:26:56,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:26:56,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088567079] [2022-11-02 20:26:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:26:56,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:26:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:26:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:26:59,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:26:59,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088567079] [2022-11-02 20:26:59,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088567079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:26:59,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638942319] [2022-11-02 20:26:59,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:26:59,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:26:59,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:26:59,045 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:26:59,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:26:59,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:26:59,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:26:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-02 20:26:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:26:59,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:26:59,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 20:26:59,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:27:00,938 INFO L356 Elim1Store]: treesize reduction 23, result has 54.9 percent of original size [2022-11-02 20:27:00,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 61 treesize of output 50 [2022-11-02 20:27:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:00,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:01,424 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 [2022-11-02 20:27:01,435 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:01,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 73 [2022-11-02 20:27:01,474 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:01,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:27:01,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:27:02,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:27:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:02,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638942319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:02,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:02,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 58 [2022-11-02 20:27:02,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346239051] [2022-11-02 20:27:02,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:02,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-02 20:27:02,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-02 20:27:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2940, Unknown=1, NotChecked=110, Total=3306 [2022-11-02 20:27:02,682 INFO L87 Difference]: Start difference. First operand 264 states and 294 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:05,583 INFO L93 Difference]: Finished difference Result 342 states and 380 transitions. [2022-11-02 20:27:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 20:27:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 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 [2022-11-02 20:27:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:05,585 INFO L225 Difference]: With dead ends: 342 [2022-11-02 20:27:05,585 INFO L226 Difference]: Without dead ends: 324 [2022-11-02 20:27:05,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=647, Invalid=6162, Unknown=1, NotChecked=162, Total=6972 [2022-11-02 20:27:05,587 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 246 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:05,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 617 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 548 Invalid, 0 Unknown, 233 Unchecked, 0.5s Time] [2022-11-02 20:27:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-02 20:27:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 281. [2022-11-02 20:27:05,592 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) [2022-11-02 20:27:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 315 transitions. [2022-11-02 20:27:05,593 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 315 transitions. Word has length 46 [2022-11-02 20:27:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:05,594 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 315 transitions. [2022-11-02 20:27:05,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 315 transitions. [2022-11-02 20:27:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:27:05,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:05,595 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] [2022-11-02 20:27:05,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:05,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-02 20:27:05,811 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)] === [2022-11-02 20:27:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:05,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1193977735, now seen corresponding path program 1 times [2022-11-02 20:27:05,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:05,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322317584] [2022-11-02 20:27:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:05,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:27:06,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:06,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322317584] [2022-11-02 20:27:06,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322317584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:06,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017317403] [2022-11-02 20:27:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:06,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:06,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:06,208 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:06,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:27:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:06,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-02 20:27:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:06,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:27:06,831 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:27:06,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-11-02 20:27:06,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-11-02 20:27:07,131 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:07,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-11-02 20:27:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:27:07,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:07,545 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:07,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-02 20:27:07,821 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((|ULTIMATE.start_cstrncat_~d~0#1.base| Int) (v_ArrVal_830 (Array Int Int))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)))) (and (or (< |c_ULTIMATE.start_cstrncat_~s~0#1.offset| (+ |c_ULTIMATE.start_cstrncat_~d~0#1.offset| 1)) .cse0) (or (<= 0 (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) .cse0) (forall ((|ULTIMATE.start_cstrncat_~d~0#1.base| Int) (v_ArrVal_830 (Array Int Int))) (or (= |c_ULTIMATE.start_cstrncat_~s~0#1.base| |ULTIMATE.start_cstrncat_~d~0#1.base|) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))))) is different from false [2022-11-02 20:27:08,585 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:08,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:27:08,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:27:08,596 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:27:08,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 11 [2022-11-02 20:27:08,604 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:08,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:27:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:27:08,611 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:08,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2022-11-02 20:27:08,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:27:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 10 refuted. 1 times theorem prover too weak. 15 trivial. 1 not checked. [2022-11-02 20:27:08,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017317403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:08,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:08,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 52 [2022-11-02 20:27:08,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595812807] [2022-11-02 20:27:08,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:08,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-02 20:27:08,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-02 20:27:08,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2377, Unknown=7, NotChecked=98, Total=2652 [2022-11-02 20:27:08,878 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) [2022-11-02 20:27:10,426 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((|ULTIMATE.start_cstrncat_~d~0#1.base| Int) (v_ArrVal_830 (Array Int Int))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)))) (and (<= |c_ULTIMATE.start_cstrncat_~n#1| 2) (<= 1 |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |ULTIMATE.start_main_~length2~0#1| (- 2) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|)) 0))) (<= 1 |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) (or (< |c_ULTIMATE.start_cstrncat_~s~0#1.offset| (+ |c_ULTIMATE.start_cstrncat_~d~0#1.offset| 1)) .cse0) (or (<= 0 (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) .cse0) (<= |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (forall ((|ULTIMATE.start_cstrncat_~d~0#1.base| Int) (v_ArrVal_830 (Array Int Int))) (or (= |c_ULTIMATE.start_cstrncat_~s~0#1.base| |ULTIMATE.start_cstrncat_~d~0#1.base|) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))) (<= 1 |c_ULTIMATE.start_cstrncat_~n#1|))) is different from false [2022-11-02 20:27:10,816 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((|ULTIMATE.start_cstrncat_~d~0#1.base| Int) (v_ArrVal_830 (Array Int Int))) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)))) (and (<= 1 |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) (exists ((|ULTIMATE.start_main_~length2~0#1| Int)) (and (< 1 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |ULTIMATE.start_main_~length2~0#1| (- 2) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|)) 0))) (<= 1 |c_ULTIMATE.start_cstrncat_~d~0#1.offset|) (or (< |c_ULTIMATE.start_cstrncat_~s~0#1.offset| (+ |c_ULTIMATE.start_cstrncat_~d~0#1.offset| 1)) .cse0) (or (<= 0 (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) .cse0) (<= |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1) (forall ((|ULTIMATE.start_cstrncat_~d~0#1.base| Int) (v_ArrVal_830 (Array Int Int))) (or (= |c_ULTIMATE.start_cstrncat_~s~0#1.base| |ULTIMATE.start_cstrncat_~d~0#1.base|) (= (select (select (store |c_#memory_int| |ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0))))) is different from false [2022-11-02 20:27:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:11,364 INFO L93 Difference]: Finished difference Result 554 states and 609 transitions. [2022-11-02 20:27:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-02 20:27:11,364 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 [2022-11-02 20:27:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:11,366 INFO L225 Difference]: With dead ends: 554 [2022-11-02 20:27:11,366 INFO L226 Difference]: Without dead ends: 530 [2022-11-02 20:27:11,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=742, Invalid=9161, Unknown=9, NotChecked=594, Total=10506 [2022-11-02 20:27:11,368 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 251 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:11,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 416 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 388 Invalid, 0 Unknown, 404 Unchecked, 0.3s Time] [2022-11-02 20:27:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-11-02 20:27:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 365. [2022-11-02 20:27:11,377 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) [2022-11-02 20:27:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 415 transitions. [2022-11-02 20:27:11,379 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 415 transitions. Word has length 47 [2022-11-02 20:27:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:11,380 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 415 transitions. [2022-11-02 20:27:11,380 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) [2022-11-02 20:27:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 415 transitions. [2022-11-02 20:27:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:27:11,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:11,381 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] [2022-11-02 20:27:11,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-02 20:27:11,605 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)] === [2022-11-02 20:27:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:11,605 INFO L85 PathProgramCache]: Analyzing trace with hash 994210165, now seen corresponding path program 2 times [2022-11-02 20:27:11,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:11,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225399200] [2022-11-02 20:27:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:11,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:27:12,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:12,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225399200] [2022-11-02 20:27:12,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225399200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:12,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121541048] [2022-11-02 20:27:12,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:27:12,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:12,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:12,336 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:12,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:27:12,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:27:12,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-02 20:27:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:12,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:27:12,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:27:13,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:27:13,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:27:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:27:13,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:13,248 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_877) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-11-02 20:27:13,295 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47|)) (not (<= |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47| |c_ULTIMATE.start_cstrncat_~s~0#1.offset|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_877) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47| 1)) 0))) is different from false [2022-11-02 20:27:13,373 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_877) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47|)) (< |c_ULTIMATE.start_cstrncat_~src#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47|))) is different from false [2022-11-02 20:27:13,387 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_877 (Array Int Int)) (|v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_877) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47| 1)) 0) (< |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |v_ULTIMATE.start_cstrncat_#t~post5#1.offset_47|))) is different from false [2022-11-02 20:27:13,408 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:13,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:27:13,417 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:13,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-02 20:27:13,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:27:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 2 not checked. [2022-11-02 20:27:13,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121541048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:13,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:13,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-11-02 20:27:13,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295686498] [2022-11-02 20:27:13,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:13,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:27:13,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:13,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:27:13,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=876, Unknown=4, NotChecked=252, Total=1260 [2022-11-02 20:27:13,877 INFO L87 Difference]: Start difference. First operand 365 states and 415 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:14,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:14,526 INFO L93 Difference]: Finished difference Result 468 states and 513 transitions. [2022-11-02 20:27:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:27:14,527 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 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 [2022-11-02 20:27:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:14,528 INFO L225 Difference]: With dead ends: 468 [2022-11-02 20:27:14,529 INFO L226 Difference]: Without dead ends: 379 [2022-11-02 20:27:14,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=1428, Unknown=4, NotChecked=324, Total=1980 [2022-11-02 20:27:14,530 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 97 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:14,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 410 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 263 Invalid, 0 Unknown, 331 Unchecked, 0.2s Time] [2022-11-02 20:27:14,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-02 20:27:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 333. [2022-11-02 20:27:14,536 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) [2022-11-02 20:27:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 371 transitions. [2022-11-02 20:27:14,538 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 371 transitions. Word has length 48 [2022-11-02 20:27:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:14,538 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 371 transitions. [2022-11-02 20:27:14,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 371 transitions. [2022-11-02 20:27:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 20:27:14,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:14,539 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] [2022-11-02 20:27:14,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:14,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-02 20:27:14,761 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)] === [2022-11-02 20:27:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:14,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1776899047, now seen corresponding path program 6 times [2022-11-02 20:27:14,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:14,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275029086] [2022-11-02 20:27:14,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:14,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:15,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275029086] [2022-11-02 20:27:15,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275029086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:15,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496322494] [2022-11-02 20:27:15,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:27:15,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:15,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:15,805 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:15,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:27:16,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-02 20:27:16,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:16,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-02 20:27:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:16,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:27:16,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:27:16,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:27:17,295 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:27:17,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:27:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:17,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:17,808 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_924 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_924) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-02 20:27:17,815 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:17,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-02 20:27:17,823 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:17,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-02 20:27:18,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:27:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:18,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496322494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:18,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:18,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 59 [2022-11-02 20:27:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467503521] [2022-11-02 20:27:18,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-02 20:27:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-02 20:27:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3132, Unknown=1, NotChecked=112, Total=3422 [2022-11-02 20:27:18,539 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) [2022-11-02 20:27:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:24,922 INFO L93 Difference]: Finished difference Result 562 states and 611 transitions. [2022-11-02 20:27:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-02 20:27:24,923 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 [2022-11-02 20:27:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:24,925 INFO L225 Difference]: With dead ends: 562 [2022-11-02 20:27:24,925 INFO L226 Difference]: Without dead ends: 505 [2022-11-02 20:27:24,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 1 IntricatePredicates, 8 DeprecatedPredicates, 3265 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=820, Invalid=11614, Unknown=2, NotChecked=220, Total=12656 [2022-11-02 20:27:24,927 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 293 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 3409 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2861 SdHoareTripleChecker+Invalid, 3958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:24,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2861 Invalid, 3958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3409 Invalid, 0 Unknown, 502 Unchecked, 2.2s Time] [2022-11-02 20:27:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-02 20:27:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 370. [2022-11-02 20:27:24,936 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) [2022-11-02 20:27:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 410 transitions. [2022-11-02 20:27:24,937 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 410 transitions. Word has length 50 [2022-11-02 20:27:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:24,938 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 410 transitions. [2022-11-02 20:27:24,938 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) [2022-11-02 20:27:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 410 transitions. [2022-11-02 20:27:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:27:24,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:24,940 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] [2022-11-02 20:27:24,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:25,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:25,165 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)] === [2022-11-02 20:27:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:25,166 INFO L85 PathProgramCache]: Analyzing trace with hash -558804912, now seen corresponding path program 5 times [2022-11-02 20:27:25,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:25,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661372064] [2022-11-02 20:27:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:25,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 30 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:27,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:27,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661372064] [2022-11-02 20:27:27,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661372064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:27,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621674230] [2022-11-02 20:27:27,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:27:27,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:27,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:27,594 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:27,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:27:27,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-02 20:27:27,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-02 20:27:27,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:27,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:27:28,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 20:27:28,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:27:30,072 INFO L356 Elim1Store]: treesize reduction 27, result has 55.7 percent of original size [2022-11-02 20:27:30,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:27:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:30,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:30,686 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_970 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_970) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 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 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-11-02 20:27:30,717 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:30,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-11-02 20:27:30,768 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:27:30,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:27:30,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:27:31,141 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-02 20:27:32,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:27:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 48 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:27:32,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621674230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:32,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:32,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 64 [2022-11-02 20:27:32,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598280605] [2022-11-02 20:27:32,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:32,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-02 20:27:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:32,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-02 20:27:32,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=3537, Unknown=1, NotChecked=122, Total=4032 [2022-11-02 20:27:32,184 INFO L87 Difference]: Start difference. First operand 370 states and 410 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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) [2022-11-02 20:27:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:34,908 INFO L93 Difference]: Finished difference Result 477 states and 527 transitions. [2022-11-02 20:27:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:27:34,909 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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 52 [2022-11-02 20:27:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:34,910 INFO L225 Difference]: With dead ends: 477 [2022-11-02 20:27:34,911 INFO L226 Difference]: Without dead ends: 443 [2022-11-02 20:27:34,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=729, Invalid=6246, Unknown=1, NotChecked=164, Total=7140 [2022-11-02 20:27:34,912 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 293 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:34,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 496 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 635 Invalid, 0 Unknown, 133 Unchecked, 0.5s Time] [2022-11-02 20:27:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-02 20:27:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 391. [2022-11-02 20:27:34,919 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) [2022-11-02 20:27:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 435 transitions. [2022-11-02 20:27:34,920 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 435 transitions. Word has length 52 [2022-11-02 20:27:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:34,920 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 435 transitions. [2022-11-02 20:27:34,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 64 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) [2022-11-02 20:27:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 435 transitions. [2022-11-02 20:27:34,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:27:34,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:34,922 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] [2022-11-02 20:27:34,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:35,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:35,137 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)] === [2022-11-02 20:27:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:35,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1217377784, now seen corresponding path program 3 times [2022-11-02 20:27:35,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:35,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784312752] [2022-11-02 20:27:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:35,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:27:35,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784312752] [2022-11-02 20:27:35,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784312752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642436951] [2022-11-02 20:27:35,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:27:35,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:35,422 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:35,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:27:36,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:27:36,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:36,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-02 20:27:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:36,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:27:36,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:27:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:27:37,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:27:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:27:39,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642436951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:39,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:39,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 21] total 56 [2022-11-02 20:27:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095148724] [2022-11-02 20:27:39,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-02 20:27:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-02 20:27:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2756, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 20:27:39,027 INFO L87 Difference]: Start difference. First operand 391 states and 435 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) [2022-11-02 20:27:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:56,113 INFO L93 Difference]: Finished difference Result 1023 states and 1106 transitions. [2022-11-02 20:27:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-02 20:27:56,113 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 52 [2022-11-02 20:27:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:56,117 INFO L225 Difference]: With dead ends: 1023 [2022-11-02 20:27:56,117 INFO L226 Difference]: Without dead ends: 987 [2022-11-02 20:27:56,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7891 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=4717, Invalid=24353, Unknown=0, NotChecked=0, Total=29070 [2022-11-02 20:27:56,120 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2138 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2138 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:56,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2138 Valid, 531 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-02 20:27:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-11-02 20:27:56,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 418. [2022-11-02 20:27:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 414 states have (on average 1.1328502415458936) internal successors, (469), 417 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 469 transitions. [2022-11-02 20:27:56,131 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 469 transitions. Word has length 52 [2022-11-02 20:27:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:56,132 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 469 transitions. [2022-11-02 20:27:56,132 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) [2022-11-02 20:27:56,132 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 469 transitions. [2022-11-02 20:27:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:27:56,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:56,133 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] [2022-11-02 20:27:56,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-02 20:27:56,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-02 20:27:56,349 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)] === [2022-11-02 20:27:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash 651549555, now seen corresponding path program 2 times [2022-11-02 20:27:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:56,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125188630] [2022-11-02 20:27:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:56,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:27:56,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:56,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125188630] [2022-11-02 20:27:56,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125188630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:56,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607529839] [2022-11-02 20:27:56,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:27:56,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:56,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:56,819 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:56,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:27:57,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:27:57,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:27:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:27:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:27:57,026 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:27:57,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-02 20:27:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:27:57,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:27:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:27:57,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607529839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:27:57,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:27:57,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-11-02 20:27:57,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679014376] [2022-11-02 20:27:57,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:27:57,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:27:57,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:27:57,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:27:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:27:57,655 INFO L87 Difference]: Start difference. First operand 418 states and 469 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) [2022-11-02 20:27:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:27:58,365 INFO L93 Difference]: Finished difference Result 522 states and 569 transitions. [2022-11-02 20:27:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:27:58,366 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 [2022-11-02 20:27:58,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:27:58,367 INFO L225 Difference]: With dead ends: 522 [2022-11-02 20:27:58,367 INFO L226 Difference]: Without dead ends: 522 [2022-11-02 20:27:58,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:27:58,368 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 353 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:27:58,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 362 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:27:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-02 20:27:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 445. [2022-11-02 20:27:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 441 states have (on average 1.124716553287982) internal successors, (496), 444 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:27:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 496 transitions. [2022-11-02 20:27:58,378 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 496 transitions. Word has length 55 [2022-11-02 20:27:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:27:58,378 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 496 transitions. [2022-11-02 20:27:58,378 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) [2022-11-02 20:27:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 496 transitions. [2022-11-02 20:27:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:27:58,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:27:58,379 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] [2022-11-02 20:27:58,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:27:58,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-02 20:27:58,581 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)] === [2022-11-02 20:27:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:27:58,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1402960811, now seen corresponding path program 7 times [2022-11-02 20:27:58,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:27:58,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825995792] [2022-11-02 20:27:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:27:58,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:27:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:27:59,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:27:59,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825995792] [2022-11-02 20:27:59,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825995792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:27:59,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828704669] [2022-11-02 20:27:59,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:27:59,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:27:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:27:59,815 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:27:59,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:27:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:27:59,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-02 20:27:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:00,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:28:00,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:28:00,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:28:01,448 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:28:01,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:28:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:01,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:02,111 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1123 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1123) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-02 20:28:02,119 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:02,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-02 20:28:02,126 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:02,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-02 20:28:02,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:28:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:02,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828704669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:02,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:02,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 65 [2022-11-02 20:28:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616847106] [2022-11-02 20:28:02,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-02 20:28:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-02 20:28:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3839, Unknown=1, NotChecked=124, Total=4160 [2022-11-02 20:28:03,001 INFO L87 Difference]: Start difference. First operand 445 states and 496 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) [2022-11-02 20:28:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:11,425 INFO L93 Difference]: Finished difference Result 751 states and 814 transitions. [2022-11-02 20:28:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:28:11,425 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 [2022-11-02 20:28:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:11,427 INFO L225 Difference]: With dead ends: 751 [2022-11-02 20:28:11,427 INFO L226 Difference]: Without dead ends: 690 [2022-11-02 20:28:11,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 1 IntricatePredicates, 9 DeprecatedPredicates, 3998 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=977, Invalid=14776, Unknown=1, NotChecked=248, Total=16002 [2022-11-02 20:28:11,429 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 333 mSDsluCounter, 3184 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 4697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 869 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:11,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 3274 Invalid, 4697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3781 Invalid, 0 Unknown, 869 Unchecked, 2.6s Time] [2022-11-02 20:28:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-11-02 20:28:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 482. [2022-11-02 20:28:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 478 states have (on average 1.1192468619246863) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2022-11-02 20:28:11,442 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 56 [2022-11-02 20:28:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:11,443 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2022-11-02 20:28:11,443 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) [2022-11-02 20:28:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2022-11-02 20:28:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:28:11,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:11,444 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] [2022-11-02 20:28:11,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:11,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-02 20:28:11,669 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)] === [2022-11-02 20:28:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1250411276, now seen corresponding path program 6 times [2022-11-02 20:28:11,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:11,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842727883] [2022-11-02 20:28:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:11,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:28:14,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842727883] [2022-11-02 20:28:14,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842727883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965467334] [2022-11-02 20:28:14,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:28:14,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:14,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:14,987 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:14,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 20:28:15,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-02 20:28:15,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:15,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-02 20:28:15,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:15,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:28:16,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 20:28:16,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 57 [2022-11-02 20:28:18,332 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:18,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 31 [2022-11-02 20:28:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:28:18,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:18,956 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1173 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1173) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |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) (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-11-02 20:28:18,967 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:18,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 97 [2022-11-02 20:28:19,004 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:19,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 186 treesize of output 206 [2022-11-02 20:28:19,027 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:19,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 76 treesize of output 50 [2022-11-02 20:28:21,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:28:21,938 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-02 20:28:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:28:22,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965467334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:22,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:22,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 62 [2022-11-02 20:28:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100993441] [2022-11-02 20:28:22,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:22,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-02 20:28:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-02 20:28:22,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=3293, Unknown=1, NotChecked=118, Total=3782 [2022-11-02 20:28:22,044 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:28,177 INFO L93 Difference]: Finished difference Result 656 states and 719 transitions. [2022-11-02 20:28:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-02 20:28:28,177 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2022-11-02 20:28:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:28,179 INFO L225 Difference]: With dead ends: 656 [2022-11-02 20:28:28,179 INFO L226 Difference]: Without dead ends: 618 [2022-11-02 20:28:28,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1034, Invalid=8671, Unknown=1, NotChecked=194, Total=9900 [2022-11-02 20:28:28,180 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 470 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:28,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 771 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1560 Invalid, 0 Unknown, 91 Unchecked, 1.6s Time] [2022-11-02 20:28:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-11-02 20:28:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 501. [2022-11-02 20:28:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 497 states have (on average 1.1207243460764587) internal successors, (557), 500 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 557 transitions. [2022-11-02 20:28:28,191 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 557 transitions. Word has length 58 [2022-11-02 20:28:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:28,191 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 557 transitions. [2022-11-02 20:28:28,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 62 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 557 transitions. [2022-11-02 20:28:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:28:28,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:28,193 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] [2022-11-02 20:28:28,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:28,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:28,409 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)] === [2022-11-02 20:28:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1533222772, now seen corresponding path program 4 times [2022-11-02 20:28:28,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:28,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939772904] [2022-11-02 20:28:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:28,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:30,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939772904] [2022-11-02 20:28:30,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939772904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131754673] [2022-11-02 20:28:30,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:28:30,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:30,090 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:30,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-02 20:28:30,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:28:30,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:30,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-02 20:28:30,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:30,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:28:31,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-02 20:28:31,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:28:31,474 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:31,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-02 20:28:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:31,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:32,054 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1227 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1227) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (= (mod (+ |c_ULTIMATE.start_main_~n~0#1| 4294967295) 4294967296) 0)) is different from false [2022-11-02 20:28:32,062 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:32,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-02 20:28:32,069 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:32,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-02 20:28:33,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:28:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:33,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131754673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:33,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:33,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 61 [2022-11-02 20:28:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932286843] [2022-11-02 20:28:33,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:33,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-02 20:28:33,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:33,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-02 20:28:33,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3269, Unknown=1, NotChecked=116, Total=3660 [2022-11-02 20:28:33,298 INFO L87 Difference]: Start difference. First operand 501 states and 557 transitions. Second operand has 61 states, 61 states have (on average 2.377049180327869) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:37,004 INFO L93 Difference]: Finished difference Result 573 states and 629 transitions. [2022-11-02 20:28:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-02 20:28:37,005 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.377049180327869) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 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 [2022-11-02 20:28:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:37,006 INFO L225 Difference]: With dead ends: 573 [2022-11-02 20:28:37,006 INFO L226 Difference]: Without dead ends: 565 [2022-11-02 20:28:37,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=945, Invalid=7800, Unknown=1, NotChecked=184, Total=8930 [2022-11-02 20:28:37,007 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 442 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:37,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 820 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1001 Invalid, 0 Unknown, 223 Unchecked, 0.8s Time] [2022-11-02 20:28:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-11-02 20:28:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 501. [2022-11-02 20:28:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 497 states have (on average 1.118712273641851) internal successors, (556), 500 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 556 transitions. [2022-11-02 20:28:37,016 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 556 transitions. Word has length 58 [2022-11-02 20:28:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:37,016 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 556 transitions. [2022-11-02 20:28:37,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.377049180327869) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 556 transitions. [2022-11-02 20:28:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:28:37,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:37,019 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] [2022-11-02 20:28:37,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:37,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-02 20:28:37,245 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)] === [2022-11-02 20:28:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:37,245 INFO L85 PathProgramCache]: Analyzing trace with hash -859796103, now seen corresponding path program 3 times [2022-11-02 20:28:37,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:37,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057440534] [2022-11-02 20:28:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:37,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:28:37,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057440534] [2022-11-02 20:28:37,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057440534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:37,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931189115] [2022-11-02 20:28:37,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:28:37,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:37,656 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:37,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-02 20:28:38,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:28:38,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-02 20:28:38,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:38,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:28:38,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:28:38,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:28:38,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:28:39,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:28:39,012 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:39,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-02 20:28:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:28:39,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:39,124 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 [2022-11-02 20:28:39,134 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 [2022-11-02 20:28:39,157 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 [2022-11-02 20:28:39,170 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 [2022-11-02 20:28:39,178 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1287 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_1287) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) 0)) is different from false [2022-11-02 20:28:39,185 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:39,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:28:39,193 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:39,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-02 20:28:39,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:28:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 13 not checked. [2022-11-02 20:28:39,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931189115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:39,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:39,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 45 [2022-11-02 20:28:39,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957413079] [2022-11-02 20:28:39,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:39,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-02 20:28:39,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:39,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-02 20:28:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1430, Unknown=5, NotChecked=400, Total=1980 [2022-11-02 20:28:39,569 INFO L87 Difference]: Start difference. First operand 501 states and 556 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) [2022-11-02 20:28:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:42,777 INFO L93 Difference]: Finished difference Result 701 states and 764 transitions. [2022-11-02 20:28:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:28:42,778 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 [2022-11-02 20:28:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:42,781 INFO L225 Difference]: With dead ends: 701 [2022-11-02 20:28:42,781 INFO L226 Difference]: Without dead ends: 629 [2022-11-02 20:28:42,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 2697 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=885, Invalid=8636, Unknown=5, NotChecked=980, Total=10506 [2022-11-02 20:28:42,782 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 280 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:42,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 530 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 651 Invalid, 0 Unknown, 697 Unchecked, 0.4s Time] [2022-11-02 20:28:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-02 20:28:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 541. [2022-11-02 20:28:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 537 states have (on average 1.1154562383612663) internal successors, (599), 540 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:42,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 599 transitions. [2022-11-02 20:28:42,793 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 599 transitions. Word has length 59 [2022-11-02 20:28:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:42,793 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 599 transitions. [2022-11-02 20:28:42,793 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) [2022-11-02 20:28:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 599 transitions. [2022-11-02 20:28:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-02 20:28:42,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:42,795 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] [2022-11-02 20:28:42,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:43,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-02 20:28:43,009 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)] === [2022-11-02 20:28:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash -469355232, now seen corresponding path program 3 times [2022-11-02 20:28:43,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:43,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661818412] [2022-11-02 20:28:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:28:43,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:43,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661818412] [2022-11-02 20:28:43,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661818412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:43,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522137712] [2022-11-02 20:28:43,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:28:43,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:43,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:43,352 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:43,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-02 20:28:43,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:28:43,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:28:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-02 20:28:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:28:43,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:28:43,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:28:44,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:28:44,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-02 20:28:44,309 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:28:44,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-02 20:28:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:28:44,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:28:44,394 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 [2022-11-02 20:28:44,407 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| 1)) 0)) is different from false [2022-11-02 20:28:44,425 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| 2)) 0)) is different from false [2022-11-02 20:28:44,445 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1346 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_1346) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncat_~src#1.offset|)) 0)) is different from false [2022-11-02 20:28:44,450 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 [2022-11-02 20:28:44,456 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:44,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:28:44,462 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:28:44,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-02 20:28:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 13 not checked. [2022-11-02 20:28:44,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522137712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:28:44,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:28:44,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-11-02 20:28:44,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646517140] [2022-11-02 20:28:44,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:28:44,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 20:28:44,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:28:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 20:28:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1021, Unknown=5, NotChecked=340, Total=1482 [2022-11-02 20:28:44,656 INFO L87 Difference]: Start difference. First operand 541 states and 599 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) [2022-11-02 20:28:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:28:47,069 INFO L93 Difference]: Finished difference Result 851 states and 921 transitions. [2022-11-02 20:28:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-02 20:28:47,069 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 [2022-11-02 20:28:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:28:47,070 INFO L225 Difference]: With dead ends: 851 [2022-11-02 20:28:47,070 INFO L226 Difference]: Without dead ends: 670 [2022-11-02 20:28:47,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 5 IntricatePredicates, 4 DeprecatedPredicates, 2608 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=775, Invalid=7250, Unknown=5, NotChecked=900, Total=8930 [2022-11-02 20:28:47,071 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 236 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 795 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:28:47,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 497 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 573 Invalid, 0 Unknown, 795 Unchecked, 0.4s Time] [2022-11-02 20:28:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-11-02 20:28:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 538. [2022-11-02 20:28:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 534 states have (on average 1.1161048689138577) internal successors, (596), 537 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:28:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 596 transitions. [2022-11-02 20:28:47,080 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 596 transitions. Word has length 61 [2022-11-02 20:28:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:28:47,080 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 596 transitions. [2022-11-02 20:28:47,080 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) [2022-11-02 20:28:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 596 transitions. [2022-11-02 20:28:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 20:28:47,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:28:47,082 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] [2022-11-02 20:28:47,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-02 20:28:47,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-02 20:28:47,305 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)] === [2022-11-02 20:28:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:28:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1518395567, now seen corresponding path program 8 times [2022-11-02 20:28:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:28:47,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952969115] [2022-11-02 20:28:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:28:47,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:28:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:28:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:28:48,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:28:48,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952969115] [2022-11-02 20:28:48,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952969115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:28:48,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572990909] [2022-11-02 20:28:48,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:28:48,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:28:48,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:28:48,617 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:28:48,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b6c3d04-3eb5-4853-8612-fd221025a0aa/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process