./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:42:17,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:42:17,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:42:17,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:42:17,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:42:17,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:42:17,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:42:17,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:42:17,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:42:17,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:42:17,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:42:17,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:42:17,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:42:17,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:42:17,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:42:17,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:42:17,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:42:17,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:42:17,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:42:17,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:42:17,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:42:17,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:42:17,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:42:17,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:42:17,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:42:17,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:42:17,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:42:17,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:42:17,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:42:17,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:42:17,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:42:17,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:42:17,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:42:17,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:42:17,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:42:17,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:42:17,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:42:17,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:42:17,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:42:17,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:42:17,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:42:17,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:42:17,889 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:42:17,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:42:17,890 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:42:17,890 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:42:17,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:42:17,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:42:17,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:42:17,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:42:17,893 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:42:17,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:42:17,894 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:42:17,895 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:42:17,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:42:17,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:42:17,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:42:17,896 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:42:17,896 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:42:17,896 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:42:17,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:42:17,896 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:42:17,896 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:42:17,897 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:42:17,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:42:17,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:42:17,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:42:17,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:42:17,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:42:17,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:42:17,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:42:17,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:42:17,899 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_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 [2022-11-16 11:42:18,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:42:18,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:42:18,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:42:18,243 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:42:18,256 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:42:18,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2022-11-16 11:42:18,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/data/96bc2efd2/ddd72598e90448b6ab75db881b565add/FLAGeadacbf98 [2022-11-16 11:42:18,902 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:42:18,903 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2022-11-16 11:42:18,934 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/data/96bc2efd2/ddd72598e90448b6ab75db881b565add/FLAGeadacbf98 [2022-11-16 11:42:19,200 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/data/96bc2efd2/ddd72598e90448b6ab75db881b565add [2022-11-16 11:42:19,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:42:19,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:42:19,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:42:19,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:42:19,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:42:19,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fcf7f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19, skipping insertion in model container [2022-11-16 11:42:19,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:42:19,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:42:19,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:42:19,636 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:42:19,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:42:19,704 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:42:19,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19 WrapperNode [2022-11-16 11:42:19,705 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:42:19,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:42:19,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:42:19,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:42:19,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,758 INFO L138 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2022-11-16 11:42:19,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:42:19,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:42:19,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:42:19,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:42:19,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:42:19,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:42:19,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:42:19,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:42:19,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (1/1) ... [2022-11-16 11:42:19,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:42:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:19,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:42:19,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:42:19,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:42:19,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:42:19,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:42:19,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:42:19,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:42:19,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:42:20,090 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:42:20,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:42:20,428 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:42:20,436 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:42:20,436 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:42:20,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:42:20 BoogieIcfgContainer [2022-11-16 11:42:20,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:42:20,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:42:20,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:42:20,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:42:20,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:42:19" (1/3) ... [2022-11-16 11:42:20,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b78c392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:42:20, skipping insertion in model container [2022-11-16 11:42:20,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:42:19" (2/3) ... [2022-11-16 11:42:20,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b78c392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:42:20, skipping insertion in model container [2022-11-16 11:42:20,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:42:20" (3/3) ... [2022-11-16 11:42:20,458 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2022-11-16 11:42:20,484 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:42:20,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-16 11:42:20,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:42:20,593 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;@50113ea3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:42:20,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-16 11:42:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:42:20,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:20,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:20,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:20,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031099, now seen corresponding path program 1 times [2022-11-16 11:42:20,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281434794] [2022-11-16 11:42:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:20,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:20,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281434794] [2022-11-16 11:42:20,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281434794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:20,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:20,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956042930] [2022-11-16 11:42:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:21,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:21,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:21,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:21,038 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 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) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:21,220 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2022-11-16 11:42:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:21,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:42:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:21,240 INFO L225 Difference]: With dead ends: 127 [2022-11-16 11:42:21,241 INFO L226 Difference]: Without dead ends: 121 [2022-11-16 11:42:21,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:21,246 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:21,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-16 11:42:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2022-11-16 11:42:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-16 11:42:21,294 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 7 [2022-11-16 11:42:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:21,294 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-16 11:42:21,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-16 11:42:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:42:21,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:21,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:21,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:42:21,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033021, now seen corresponding path program 1 times [2022-11-16 11:42:21,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:21,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168227824] [2022-11-16 11:42:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:21,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168227824] [2022-11-16 11:42:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168227824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:21,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:21,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:42:21,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905334710] [2022-11-16 11:42:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:42:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:42:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:42:21,347 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:21,410 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-11-16 11:42:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:42:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:42:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:21,412 INFO L225 Difference]: With dead ends: 47 [2022-11-16 11:42:21,412 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 11:42:21,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:42:21,414 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:21,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 11:42:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-11-16 11:42:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.75) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-16 11:42:21,420 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2022-11-16 11:42:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:21,421 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-16 11:42:21,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-16 11:42:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:42:21,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:21,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:21,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:42:21,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-11-16 11:42:21,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:21,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661270895] [2022-11-16 11:42:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:21,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:21,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:21,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661270895] [2022-11-16 11:42:21,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661270895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:21,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:21,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:42:21,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036911108] [2022-11-16 11:42:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:21,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:21,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:21,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:21,547 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:21,589 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-11-16 11:42:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:42:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:42:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:21,591 INFO L225 Difference]: With dead ends: 78 [2022-11-16 11:42:21,591 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 11:42:21,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:21,594 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:21,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 11:42:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2022-11-16 11:42:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-16 11:42:21,609 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2022-11-16 11:42:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:21,611 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-16 11:42:21,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-16 11:42:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:42:21,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:21,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:21,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:42:21,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:21,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-11-16 11:42:21,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:21,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908527622] [2022-11-16 11:42:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:21,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:21,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:21,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908527622] [2022-11-16 11:42:21,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908527622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:21,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:21,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:21,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578589082] [2022-11-16 11:42:21,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:21,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:21,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:21,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:21,822 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:21,939 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-11-16 11:42:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:21,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:42:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:21,941 INFO L225 Difference]: With dead ends: 84 [2022-11-16 11:42:21,941 INFO L226 Difference]: Without dead ends: 84 [2022-11-16 11:42:21,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:21,943 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:21,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 163 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-16 11:42:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2022-11-16 11:42:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-16 11:42:21,950 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2022-11-16 11:42:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:21,950 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-16 11:42:21,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-16 11:42:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:42:21,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:21,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:21,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:42:21,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2022-11-16 11:42:21,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:21,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321476645] [2022-11-16 11:42:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:21,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321476645] [2022-11-16 11:42:22,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321476645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:22,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:22,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:42:22,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433827670] [2022-11-16 11:42:22,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:22,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:42:22,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:42:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:42:22,376 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:22,429 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-16 11:42:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:42:22,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:42:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:22,431 INFO L225 Difference]: With dead ends: 45 [2022-11-16 11:42:22,431 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 11:42:22,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:42:22,433 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:22,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 11:42:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-16 11:42:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.65625) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-16 11:42:22,439 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2022-11-16 11:42:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:22,440 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-16 11:42:22,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-16 11:42:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:42:22,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:22,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:22,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:42:22,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:22,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2022-11-16 11:42:22,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:22,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621779473] [2022-11-16 11:42:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:22,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:22,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:22,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621779473] [2022-11-16 11:42:22,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621779473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:22,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:22,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:22,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953251407] [2022-11-16 11:42:22,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:22,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:42:22,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:42:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:22,683 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:22,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:22,879 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2022-11-16 11:42:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:22,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:42:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:22,883 INFO L225 Difference]: With dead ends: 80 [2022-11-16 11:42:22,884 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 11:42:22,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:42:22,886 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 158 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:22,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 70 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 11:42:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 47. [2022-11-16 11:42:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-11-16 11:42:22,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2022-11-16 11:42:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:22,896 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-11-16 11:42:22,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-11-16 11:42:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:42:22,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:22,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:22,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:42:22,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2022-11-16 11:42:22,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:22,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891866198] [2022-11-16 11:42:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891866198] [2022-11-16 11:42:23,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891866198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:23,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:23,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:42:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093449603] [2022-11-16 11:42:23,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:23,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:23,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:23,080 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:23,129 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2022-11-16 11:42:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:42:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:42:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:23,131 INFO L225 Difference]: With dead ends: 79 [2022-11-16 11:42:23,131 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 11:42:23,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:23,133 INFO L413 NwaCegarLoop]: 33 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, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:23,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 11:42:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2022-11-16 11:42:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 55 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-11-16 11:42:23,141 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2022-11-16 11:42:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:23,142 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-11-16 11:42:23,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-11-16 11:42:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:42:23,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:23,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:23,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:42:23,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2022-11-16 11:42:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:23,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35628821] [2022-11-16 11:42:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:23,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35628821] [2022-11-16 11:42:23,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35628821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:23,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:23,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:42:23,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158563159] [2022-11-16 11:42:23,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:23,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:23,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:23,204 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:23,227 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2022-11-16 11:42:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:42:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:42:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:23,229 INFO L225 Difference]: With dead ends: 96 [2022-11-16 11:42:23,229 INFO L226 Difference]: Without dead ends: 96 [2022-11-16 11:42:23,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:23,231 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 56 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:23,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 88 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:23,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-16 11:42:23,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-11-16 11:42:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.5) internal successors, (87), 70 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) [2022-11-16 11:42:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-11-16 11:42:23,240 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 10 [2022-11-16 11:42:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:23,240 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-11-16 11:42:23,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,241 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-11-16 11:42:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:42:23,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:23,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:23,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:42:23,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:23,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash 747838365, now seen corresponding path program 1 times [2022-11-16 11:42:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:23,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162835947] [2022-11-16 11:42:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:23,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:23,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:23,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162835947] [2022-11-16 11:42:23,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162835947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:23,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:23,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:42:23,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604546911] [2022-11-16 11:42:23,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:23,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:42:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:42:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:23,355 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:23,475 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2022-11-16 11:42:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:42:23,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:42:23,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:23,477 INFO L225 Difference]: With dead ends: 133 [2022-11-16 11:42:23,478 INFO L226 Difference]: Without dead ends: 133 [2022-11-16 11:42:23,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:42:23,483 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 195 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:23,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 140 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-16 11:42:23,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 70. [2022-11-16 11:42:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 69 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) [2022-11-16 11:42:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2022-11-16 11:42:23,501 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 10 [2022-11-16 11:42:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:23,501 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2022-11-16 11:42:23,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2022-11-16 11:42:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:42:23,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:23,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:23,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:42:23,510 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:23,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121569, now seen corresponding path program 1 times [2022-11-16 11:42:23,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:23,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799421060] [2022-11-16 11:42:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:23,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:23,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:23,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799421060] [2022-11-16 11:42:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799421060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:23,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:23,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:42:23,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734109022] [2022-11-16 11:42:23,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:23,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:42:23,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:23,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:42:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:42:23,567 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:23,600 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-11-16 11:42:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:42:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:42:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:23,601 INFO L225 Difference]: With dead ends: 68 [2022-11-16 11:42:23,601 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 11:42:23,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:42:23,603 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:23,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 11:42:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-16 11:42:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-11-16 11:42:23,619 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 10 [2022-11-16 11:42:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:23,620 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-11-16 11:42:23,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-11-16 11:42:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:42:23,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:23,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:23,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:42:23,621 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:23,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121568, now seen corresponding path program 1 times [2022-11-16 11:42:23,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:23,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245023704] [2022-11-16 11:42:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:23,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:23,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:23,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245023704] [2022-11-16 11:42:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245023704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:23,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:23,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:42:23,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596440141] [2022-11-16 11:42:23,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:23,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:42:23,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:23,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:42:23,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:23,868 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:24,048 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2022-11-16 11:42:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:42:24,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:42:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:24,050 INFO L225 Difference]: With dead ends: 99 [2022-11-16 11:42:24,050 INFO L226 Difference]: Without dead ends: 99 [2022-11-16 11:42:24,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:42:24,051 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 201 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:24,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 64 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-16 11:42:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2022-11-16 11:42:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-11-16 11:42:24,056 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 10 [2022-11-16 11:42:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:24,056 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-11-16 11:42:24,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-11-16 11:42:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:42:24,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:24,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:24,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:42:24,058 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash -118766615, now seen corresponding path program 1 times [2022-11-16 11:42:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:24,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512307397] [2022-11-16 11:42:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:24,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:24,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:24,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512307397] [2022-11-16 11:42:24,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512307397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:24,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:24,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:24,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715079939] [2022-11-16 11:42:24,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:24,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:42:24,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:42:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:24,242 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:24,347 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-11-16 11:42:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:24,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:42:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:24,349 INFO L225 Difference]: With dead ends: 96 [2022-11-16 11:42:24,349 INFO L226 Difference]: Without dead ends: 96 [2022-11-16 11:42:24,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:24,350 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 135 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:24,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 93 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:24,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-16 11:42:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2022-11-16 11:42:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 68 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-11-16 11:42:24,355 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 10 [2022-11-16 11:42:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:24,355 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-11-16 11:42:24,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-11-16 11:42:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:42:24,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:24,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:24,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:42:24,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240747, now seen corresponding path program 1 times [2022-11-16 11:42:24,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:24,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796638916] [2022-11-16 11:42:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:24,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:24,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796638916] [2022-11-16 11:42:24,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796638916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:24,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:24,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:42:24,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906053195] [2022-11-16 11:42:24,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:24,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:24,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:24,540 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:24,655 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-11-16 11:42:24,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:24,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-11-16 11:42:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:24,657 INFO L225 Difference]: With dead ends: 104 [2022-11-16 11:42:24,657 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 11:42:24,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:24,659 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:24,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 74 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 11:42:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2022-11-16 11:42:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 68 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-11-16 11:42:24,662 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 10 [2022-11-16 11:42:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:24,663 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-11-16 11:42:24,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-11-16 11:42:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:42:24,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:24,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:24,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:42:24,664 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:24,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:24,665 INFO L85 PathProgramCache]: Analyzing trace with hash -66856135, now seen corresponding path program 1 times [2022-11-16 11:42:24,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:24,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034784955] [2022-11-16 11:42:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:24,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:24,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034784955] [2022-11-16 11:42:24,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034784955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:24,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:24,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:42:24,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414819817] [2022-11-16 11:42:24,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:24,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:24,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:24,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:24,855 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:24,941 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-11-16 11:42:24,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:24,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-16 11:42:24,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:24,942 INFO L225 Difference]: With dead ends: 118 [2022-11-16 11:42:24,943 INFO L226 Difference]: Without dead ends: 118 [2022-11-16 11:42:24,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:24,944 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 98 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:24,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 121 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:24,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-16 11:42:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 75. [2022-11-16 11:42:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.4375) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2022-11-16 11:42:24,947 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 11 [2022-11-16 11:42:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:24,948 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2022-11-16 11:42:24,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2022-11-16 11:42:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:42:24,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:24,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:24,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:42:24,949 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1708151227, now seen corresponding path program 1 times [2022-11-16 11:42:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:24,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138829354] [2022-11-16 11:42:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:25,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:25,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138829354] [2022-11-16 11:42:25,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138829354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:25,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:25,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:25,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046890847] [2022-11-16 11:42:25,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:25,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:42:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:42:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:25,090 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:25,199 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2022-11-16 11:42:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-16 11:42:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:25,200 INFO L225 Difference]: With dead ends: 99 [2022-11-16 11:42:25,201 INFO L226 Difference]: Without dead ends: 99 [2022-11-16 11:42:25,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:25,201 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:25,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 118 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-16 11:42:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 75. [2022-11-16 11:42:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.4375) internal successors, (92), 74 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2022-11-16 11:42:25,205 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 11 [2022-11-16 11:42:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:25,205 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2022-11-16 11:42:25,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2022-11-16 11:42:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:42:25,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:25,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:25,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:42:25,207 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:25,207 INFO L85 PathProgramCache]: Analyzing trace with hash -876202761, now seen corresponding path program 1 times [2022-11-16 11:42:25,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:25,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118235752] [2022-11-16 11:42:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:25,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:25,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118235752] [2022-11-16 11:42:25,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118235752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:25,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:25,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524548971] [2022-11-16 11:42:25,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:25,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:42:25,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:42:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:25,378 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:25,470 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2022-11-16 11:42:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:25,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-16 11:42:25,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:25,472 INFO L225 Difference]: With dead ends: 104 [2022-11-16 11:42:25,472 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 11:42:25,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:25,473 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:25,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 88 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 11:42:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2022-11-16 11:42:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 71 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-11-16 11:42:25,476 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 11 [2022-11-16 11:42:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:25,477 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-11-16 11:42:25,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-11-16 11:42:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:42:25,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:25,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:25,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:42:25,479 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash 898804601, now seen corresponding path program 1 times [2022-11-16 11:42:25,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:25,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672152706] [2022-11-16 11:42:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:25,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:25,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672152706] [2022-11-16 11:42:25,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672152706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:25,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:25,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:25,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618386282] [2022-11-16 11:42:25,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:25,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:42:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:42:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:25,675 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:25,741 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-11-16 11:42:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-16 11:42:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:25,742 INFO L225 Difference]: With dead ends: 71 [2022-11-16 11:42:25,742 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 11:42:25,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:25,744 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 107 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:25,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 28 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 11:42:25,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2022-11-16 11:42:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 67 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2022-11-16 11:42:25,747 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 11 [2022-11-16 11:42:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:25,747 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2022-11-16 11:42:25,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2022-11-16 11:42:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:42:25,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:25,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:25,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:42:25,750 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2022-11-16 11:42:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:25,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153012138] [2022-11-16 11:42:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:26,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:26,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153012138] [2022-11-16 11:42:26,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153012138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:26,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221097790] [2022-11-16 11:42:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:26,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:26,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:26,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:26,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:42:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:26,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:42:26,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:42:26,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 11:42:26,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:42:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:26,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:26,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:42:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:26,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221097790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:26,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:26,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-16 11:42:26,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000493569] [2022-11-16 11:42:26,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:26,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:42:26,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:26,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:42:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:42:26,969 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:27,550 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2022-11-16 11:42:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:42:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:42:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:27,552 INFO L225 Difference]: With dead ends: 124 [2022-11-16 11:42:27,552 INFO L226 Difference]: Without dead ends: 124 [2022-11-16 11:42:27,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:42:27,553 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 429 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:27,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 188 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:42:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-16 11:42:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 65. [2022-11-16 11:42:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2022-11-16 11:42:27,557 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 12 [2022-11-16 11:42:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:27,557 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2022-11-16 11:42:27,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2022-11-16 11:42:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:42:27,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:27,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:27,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:27,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:42:27,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:27,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:27,764 INFO L85 PathProgramCache]: Analyzing trace with hash 175763932, now seen corresponding path program 1 times [2022-11-16 11:42:27,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:27,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246382456] [2022-11-16 11:42:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:27,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:27,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:27,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246382456] [2022-11-16 11:42:27,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246382456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:27,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:27,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:42:27,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178675611] [2022-11-16 11:42:27,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:27,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:27,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:27,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:27,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:27,832 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:27,885 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-11-16 11:42:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:42:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:42:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:27,887 INFO L225 Difference]: With dead ends: 64 [2022-11-16 11:42:27,887 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 11:42:27,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:27,888 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:27,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 49 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 11:42:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-16 11:42:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-11-16 11:42:27,892 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 13 [2022-11-16 11:42:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:27,893 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-11-16 11:42:27,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-11-16 11:42:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:42:27,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:27,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:27,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 11:42:27,895 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:27,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash 175763933, now seen corresponding path program 1 times [2022-11-16 11:42:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:27,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214817122] [2022-11-16 11:42:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:28,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:28,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214817122] [2022-11-16 11:42:28,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214817122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:28,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:28,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:28,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249463439] [2022-11-16 11:42:28,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:28,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:42:28,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:42:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:42:28,044 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:28,140 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-11-16 11:42:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:28,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:42:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:28,141 INFO L225 Difference]: With dead ends: 72 [2022-11-16 11:42:28,141 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 11:42:28,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:42:28,143 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:28,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 68 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 11:42:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-11-16 11:42:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2022-11-16 11:42:28,146 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 13 [2022-11-16 11:42:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:28,147 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2022-11-16 11:42:28,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2022-11-16 11:42:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:42:28,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:28,148 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:28,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:42:28,148 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:28,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1510420451, now seen corresponding path program 1 times [2022-11-16 11:42:28,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:28,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502550325] [2022-11-16 11:42:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:28,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:28,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502550325] [2022-11-16 11:42:28,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502550325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506037704] [2022-11-16 11:42:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:28,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:28,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:28,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:28,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:42:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:28,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:42:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:28,579 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:42:28,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-16 11:42:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:28,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:29,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506037704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:29,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:29,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-16 11:42:29,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535660587] [2022-11-16 11:42:29,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:29,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:42:29,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:29,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:42:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:42:29,383 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:29,970 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2022-11-16 11:42:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:42:29,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:42:29,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:29,972 INFO L225 Difference]: With dead ends: 115 [2022-11-16 11:42:29,972 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 11:42:29,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:42:29,973 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 440 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:29,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 185 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:42:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 11:42:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 60. [2022-11-16 11:42:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-11-16 11:42:29,976 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 14 [2022-11-16 11:42:29,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:29,977 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-11-16 11:42:29,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-11-16 11:42:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:42:29,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:29,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:29,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:30,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:42:30,185 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125358, now seen corresponding path program 1 times [2022-11-16 11:42:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:30,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140336979] [2022-11-16 11:42:30,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:30,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:30,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:30,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140336979] [2022-11-16 11:42:30,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140336979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:30,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:30,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:42:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491256035] [2022-11-16 11:42:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:30,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:42:30,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:30,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:42:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:30,420 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:30,463 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-11-16 11:42:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:30,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:42:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:30,465 INFO L225 Difference]: With dead ends: 59 [2022-11-16 11:42:30,465 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 11:42:30,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:30,466 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:30,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 36 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 11:42:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-11-16 11:42:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.372093023255814) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-11-16 11:42:30,468 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2022-11-16 11:42:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:30,468 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-11-16 11:42:30,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-11-16 11:42:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:42:30,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:30,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:30,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:42:30,469 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash 618210419, now seen corresponding path program 1 times [2022-11-16 11:42:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:30,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147007831] [2022-11-16 11:42:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:30,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:30,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:30,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147007831] [2022-11-16 11:42:30,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147007831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:30,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:30,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:42:30,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330395880] [2022-11-16 11:42:30,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:30,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:30,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:30,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:30,557 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:30,607 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-11-16 11:42:30,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-16 11:42:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:30,610 INFO L225 Difference]: With dead ends: 48 [2022-11-16 11:42:30,610 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 11:42:30,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:30,611 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:30,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 68 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 11:42:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-16 11:42:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 47 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-11-16 11:42:30,614 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 16 [2022-11-16 11:42:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:30,615 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-11-16 11:42:30,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-11-16 11:42:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:42:30,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:30,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 11:42:30,617 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash 618210420, now seen corresponding path program 1 times [2022-11-16 11:42:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:30,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540785890] [2022-11-16 11:42:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:30,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:30,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540785890] [2022-11-16 11:42:30,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540785890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:30,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:30,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:42:30,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606417626] [2022-11-16 11:42:30,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:30,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:42:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:42:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:30,830 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:30,939 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-11-16 11:42:30,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:42:30,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-16 11:42:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:30,940 INFO L225 Difference]: With dead ends: 66 [2022-11-16 11:42:30,940 INFO L226 Difference]: Without dead ends: 66 [2022-11-16 11:42:30,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:42:30,941 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:30,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 101 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-16 11:42:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2022-11-16 11:42:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-16 11:42:30,943 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2022-11-16 11:42:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:30,943 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-16 11:42:30,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-16 11:42:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:42:30,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:30,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:30,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 11:42:30,944 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash 618212108, now seen corresponding path program 1 times [2022-11-16 11:42:30,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:30,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172599303] [2022-11-16 11:42:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:30,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:31,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172599303] [2022-11-16 11:42:31,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172599303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074096257] [2022-11-16 11:42:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:31,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:31,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:31,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:31,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:42:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:42:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:31,325 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:31,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:42:31,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:42:31,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:31,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-16 11:42:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:31,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:31,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-16 11:42:31,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-16 11:42:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:31,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074096257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:31,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:31,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-11-16 11:42:31,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856537343] [2022-11-16 11:42:31,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:31,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:42:31,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:42:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:42:31,907 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:32,201 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-11-16 11:42:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:42:32,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 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 16 [2022-11-16 11:42:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:32,203 INFO L225 Difference]: With dead ends: 77 [2022-11-16 11:42:32,203 INFO L226 Difference]: Without dead ends: 77 [2022-11-16 11:42:32,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:42:32,204 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 62 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:32,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 300 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 169 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-16 11:42:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-16 11:42:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-11-16 11:42:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-11-16 11:42:32,207 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 16 [2022-11-16 11:42:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:32,207 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-11-16 11:42:32,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-11-16 11:42:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:42:32,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:32,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:32,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:32,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:32,414 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653866, now seen corresponding path program 1 times [2022-11-16 11:42:32,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:32,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045270573] [2022-11-16 11:42:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:32,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:32,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:32,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045270573] [2022-11-16 11:42:32,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045270573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:32,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:32,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:42:32,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116591913] [2022-11-16 11:42:32,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:32,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:32,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:32,501 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:32,548 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-11-16 11:42:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:42:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:42:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:32,549 INFO L225 Difference]: With dead ends: 52 [2022-11-16 11:42:32,550 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 11:42:32,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:32,551 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:32,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 11:42:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-16 11:42:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.3125) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-11-16 11:42:32,553 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 17 [2022-11-16 11:42:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:32,554 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-11-16 11:42:32,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-11-16 11:42:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:42:32,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:32,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:32,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 11:42:32,555 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653867, now seen corresponding path program 1 times [2022-11-16 11:42:32,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:32,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424300822] [2022-11-16 11:42:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:32,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:32,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424300822] [2022-11-16 11:42:32,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424300822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:32,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:32,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:42:32,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100007420] [2022-11-16 11:42:32,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:32,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:42:32,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:42:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:32,734 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:32,849 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-16 11:42:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:42:32,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:42:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:32,850 INFO L225 Difference]: With dead ends: 60 [2022-11-16 11:42:32,850 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 11:42:32,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:42:32,851 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 105 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:32,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 11:42:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-11-16 11:42:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2022-11-16 11:42:32,853 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 17 [2022-11-16 11:42:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:32,854 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2022-11-16 11:42:32,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2022-11-16 11:42:32,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:42:32,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:32,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:32,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 11:42:32,855 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash 337162109, now seen corresponding path program 2 times [2022-11-16 11:42:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:32,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096176504] [2022-11-16 11:42:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:42:33,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:33,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096176504] [2022-11-16 11:42:33,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096176504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:33,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:33,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:42:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817942368] [2022-11-16 11:42:33,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:33,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:42:33,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:33,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:42:33,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:33,033 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:33,138 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-11-16 11:42:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:42:33,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 19 [2022-11-16 11:42:33,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:33,139 INFO L225 Difference]: With dead ends: 77 [2022-11-16 11:42:33,139 INFO L226 Difference]: Without dead ends: 77 [2022-11-16 11:42:33,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:42:33,140 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:33,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 174 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-16 11:42:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2022-11-16 11:42:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.25) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-11-16 11:42:33,143 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 19 [2022-11-16 11:42:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:33,143 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-11-16 11:42:33,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-11-16 11:42:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:42:33,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:33,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:33,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 11:42:33,145 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -942701569, now seen corresponding path program 1 times [2022-11-16 11:42:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:33,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571297420] [2022-11-16 11:42:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:42:33,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:33,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571297420] [2022-11-16 11:42:33,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571297420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:33,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:33,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:42:33,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486955992] [2022-11-16 11:42:33,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:33,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:42:33,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:42:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:42:33,358 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:33,577 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-11-16 11:42:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:42:33,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 19 [2022-11-16 11:42:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:33,579 INFO L225 Difference]: With dead ends: 91 [2022-11-16 11:42:33,579 INFO L226 Difference]: Without dead ends: 91 [2022-11-16 11:42:33,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:42:33,580 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 101 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:33,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 184 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-16 11:42:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2022-11-16 11:42:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-11-16 11:42:33,583 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 19 [2022-11-16 11:42:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:33,583 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-11-16 11:42:33,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-11-16 11:42:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:42:33,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:33,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:33,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-16 11:42:33,584 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:33,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1963769923, now seen corresponding path program 1 times [2022-11-16 11:42:33,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:33,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757798939] [2022-11-16 11:42:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:33,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:42:33,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:33,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757798939] [2022-11-16 11:42:33,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757798939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:33,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:33,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:42:33,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242835115] [2022-11-16 11:42:33,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:33,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:42:33,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:42:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:42:33,870 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:34,021 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-11-16 11:42:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:42:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 19 [2022-11-16 11:42:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:34,022 INFO L225 Difference]: With dead ends: 82 [2022-11-16 11:42:34,022 INFO L226 Difference]: Without dead ends: 82 [2022-11-16 11:42:34,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:42:34,023 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:34,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 149 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-16 11:42:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2022-11-16 11:42:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-11-16 11:42:34,025 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2022-11-16 11:42:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:34,026 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-11-16 11:42:34,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-11-16 11:42:34,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:42:34,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:34,026 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:34,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-16 11:42:34,028 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash 303592444, now seen corresponding path program 1 times [2022-11-16 11:42:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:34,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491647858] [2022-11-16 11:42:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:34,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:34,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491647858] [2022-11-16 11:42:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491647858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:34,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:34,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:42:34,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602474820] [2022-11-16 11:42:34,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:34,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:42:34,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:34,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:42:34,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:42:34,455 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:34,745 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2022-11-16 11:42:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:42:34,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:42:34,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:34,747 INFO L225 Difference]: With dead ends: 110 [2022-11-16 11:42:34,747 INFO L226 Difference]: Without dead ends: 110 [2022-11-16 11:42:34,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:42:34,748 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 103 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:34,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 173 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-16 11:42:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2022-11-16 11:42:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 85 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) [2022-11-16 11:42:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-11-16 11:42:34,751 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 20 [2022-11-16 11:42:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:34,751 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-11-16 11:42:34,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-11-16 11:42:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:42:34,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:34,752 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:34,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 11:42:34,753 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:34,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1690552262, now seen corresponding path program 1 times [2022-11-16 11:42:34,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:34,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406390267] [2022-11-16 11:42:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:34,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:35,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:35,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406390267] [2022-11-16 11:42:35,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406390267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:35,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:35,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 11:42:35,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811453037] [2022-11-16 11:42:35,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:35,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:42:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:42:35,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:42:35,226 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:35,707 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2022-11-16 11:42:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:42:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:42:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:35,708 INFO L225 Difference]: With dead ends: 114 [2022-11-16 11:42:35,708 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 11:42:35,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:42:35,709 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:35,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 195 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 11:42:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2022-11-16 11:42:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.240506329113924) internal successors, (98), 82 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2022-11-16 11:42:35,712 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 20 [2022-11-16 11:42:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:35,712 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2022-11-16 11:42:35,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2022-11-16 11:42:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:42:35,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:35,713 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:35,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-16 11:42:35,713 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1016067132, now seen corresponding path program 1 times [2022-11-16 11:42:35,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:35,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387612277] [2022-11-16 11:42:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:35,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:36,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:36,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387612277] [2022-11-16 11:42:36,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387612277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:36,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:36,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:42:36,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755690088] [2022-11-16 11:42:36,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:36,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:42:36,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:36,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:42:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:42:36,017 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:36,320 INFO L93 Difference]: Finished difference Result 127 states and 147 transitions. [2022-11-16 11:42:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:42:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:42:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:36,321 INFO L225 Difference]: With dead ends: 127 [2022-11-16 11:42:36,321 INFO L226 Difference]: Without dead ends: 127 [2022-11-16 11:42:36,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:42:36,322 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:36,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 170 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:42:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-16 11:42:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2022-11-16 11:42:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.2696629213483146) internal successors, (113), 92 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2022-11-16 11:42:36,325 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 20 [2022-11-16 11:42:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:36,325 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2022-11-16 11:42:36,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2022-11-16 11:42:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:42:36,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:36,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:36,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 11:42:36,326 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash 821386545, now seen corresponding path program 1 times [2022-11-16 11:42:36,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:36,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087488904] [2022-11-16 11:42:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:36,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:36,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:36,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087488904] [2022-11-16 11:42:36,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087488904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:36,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:36,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:42:36,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294526601] [2022-11-16 11:42:36,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:36,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:36,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:36,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:36,496 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:36,519 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-11-16 11:42:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:42:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:42:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:36,521 INFO L225 Difference]: With dead ends: 92 [2022-11-16 11:42:36,521 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 11:42:36,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:36,526 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:36,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:42:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 11:42:36,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-16 11:42:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 74 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) [2022-11-16 11:42:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-11-16 11:42:36,529 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 21 [2022-11-16 11:42:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:36,529 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-11-16 11:42:36,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-11-16 11:42:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:42:36,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:36,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:36,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-16 11:42:36,530 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash 293432666, now seen corresponding path program 1 times [2022-11-16 11:42:36,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:36,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90449328] [2022-11-16 11:42:36,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:36,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:36,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:36,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90449328] [2022-11-16 11:42:36,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90449328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:36,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114677287] [2022-11-16 11:42:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:36,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:36,882 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:36,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:42:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:36,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:42:36,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:37,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:42:37,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:42:37,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:37,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 11:42:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:37,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:37,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:42:37,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:42:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:37,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114677287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:37,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:37,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-11-16 11:42:37,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791659354] [2022-11-16 11:42:37,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:37,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:42:37,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:42:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:42:37,999 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:39,039 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2022-11-16 11:42:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:42:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 11:42:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:39,040 INFO L225 Difference]: With dead ends: 136 [2022-11-16 11:42:39,040 INFO L226 Difference]: Without dead ends: 136 [2022-11-16 11:42:39,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:42:39,042 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 124 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:39,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 315 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 505 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2022-11-16 11:42:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-16 11:42:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2022-11-16 11:42:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.196078431372549) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2022-11-16 11:42:39,045 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 23 [2022-11-16 11:42:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:39,045 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2022-11-16 11:42:39,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2022-11-16 11:42:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 11:42:39,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:39,046 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] [2022-11-16 11:42:39,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:39,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:39,247 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash 506425757, now seen corresponding path program 1 times [2022-11-16 11:42:39,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:39,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147940829] [2022-11-16 11:42:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:39,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:39,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147940829] [2022-11-16 11:42:39,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147940829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865062135] [2022-11-16 11:42:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:39,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:39,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:39,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:42:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:42:39,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:39,681 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:39,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:42:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:39,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:40,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865062135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:40,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:40,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-11-16 11:42:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045761405] [2022-11-16 11:42:40,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:42:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:42:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:42:40,056 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:40,586 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2022-11-16 11:42:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:42:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 22 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) Word has length 24 [2022-11-16 11:42:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:40,587 INFO L225 Difference]: With dead ends: 126 [2022-11-16 11:42:40,587 INFO L226 Difference]: Without dead ends: 112 [2022-11-16 11:42:40,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:42:40,589 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 201 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:40,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 282 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:42:40,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-16 11:42:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 96. [2022-11-16 11:42:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 95 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2022-11-16 11:42:40,592 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 24 [2022-11-16 11:42:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:40,592 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2022-11-16 11:42:40,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2022-11-16 11:42:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 11:42:40,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:40,593 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] [2022-11-16 11:42:40,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:40,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 11:42:40,802 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1809160449, now seen corresponding path program 1 times [2022-11-16 11:42:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124543474] [2022-11-16 11:42:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:41,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124543474] [2022-11-16 11:42:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124543474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183801189] [2022-11-16 11:42:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:41,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:41,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:41,095 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:41,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:42:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:41,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:42:41,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:41,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:41,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:42:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:41,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183801189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:41,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:41,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-16 11:42:41,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588903419] [2022-11-16 11:42:41,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:41,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:42:41,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:42:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:42:41,581 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:41,957 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2022-11-16 11:42:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:42:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 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 24 [2022-11-16 11:42:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:41,959 INFO L225 Difference]: With dead ends: 110 [2022-11-16 11:42:41,959 INFO L226 Difference]: Without dead ends: 110 [2022-11-16 11:42:41,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:42:41,960 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 129 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:41,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 256 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:42:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-16 11:42:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2022-11-16 11:42:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 97 states have (on average 1.175257731958763) internal successors, (114), 99 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2022-11-16 11:42:41,963 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 24 [2022-11-16 11:42:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:41,963 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2022-11-16 11:42:41,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2022-11-16 11:42:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:42:41,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:41,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:41,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:42,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 11:42:42,176 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash -249399040, now seen corresponding path program 1 times [2022-11-16 11:42:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:42,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006049112] [2022-11-16 11:42:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:42,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:42,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006049112] [2022-11-16 11:42:42,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006049112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016831854] [2022-11-16 11:42:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:42,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:42,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:42,676 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:42,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:42:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:42:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:42,884 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:42,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:42:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:43,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:42:43,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016831854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:43,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:43,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2022-11-16 11:42:43,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416119718] [2022-11-16 11:42:43,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:43,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:42:43,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:42:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:42:43,476 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 26 states, 25 states have (on average 2.92) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:44,673 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2022-11-16 11:42:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:42:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.92) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 11:42:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:44,675 INFO L225 Difference]: With dead ends: 127 [2022-11-16 11:42:44,675 INFO L226 Difference]: Without dead ends: 127 [2022-11-16 11:42:44,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:42:44,676 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 438 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:44,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 192 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:42:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-16 11:42:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2022-11-16 11:42:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 109 states have (on average 1.165137614678899) internal successors, (127), 111 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2022-11-16 11:42:44,680 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 25 [2022-11-16 11:42:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:44,680 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2022-11-16 11:42:44,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.92) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2022-11-16 11:42:44,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:42:44,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:44,681 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:44,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:44,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 11:42:44,882 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:44,882 INFO L85 PathProgramCache]: Analyzing trace with hash 446658823, now seen corresponding path program 2 times [2022-11-16 11:42:44,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:44,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348010005] [2022-11-16 11:42:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:44,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:45,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:45,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348010005] [2022-11-16 11:42:45,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348010005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:45,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341867302] [2022-11-16 11:42:45,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:42:45,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:45,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:45,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:45,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:42:45,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:42:45,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:45,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:42:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:45,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:42:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:42:46,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-16 11:42:46,368 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-11-16 11:42:46,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-11-16 11:42:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:42:46,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:42:46,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-11-16 11:42:46,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:42:46,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:42:46,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:46,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-11-16 11:42:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:46,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:47,246 INFO L321 Elim1Store]: treesize reduction 17, result has 54.1 percent of original size [2022-11-16 11:42:47,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 69 [2022-11-16 11:42:47,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:42:47,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:47,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2022-11-16 11:42:47,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:42:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:47,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341867302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:47,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:47,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 36 [2022-11-16 11:42:47,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105331461] [2022-11-16 11:42:47,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:47,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:42:47,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:47,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:42:47,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1114, Unknown=17, NotChecked=0, Total=1260 [2022-11-16 11:42:47,609 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:49,296 INFO L93 Difference]: Finished difference Result 219 states and 242 transitions. [2022-11-16 11:42:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:42:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 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) Word has length 28 [2022-11-16 11:42:49,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:49,305 INFO L225 Difference]: With dead ends: 219 [2022-11-16 11:42:49,305 INFO L226 Difference]: Without dead ends: 177 [2022-11-16 11:42:49,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=388, Invalid=2899, Unknown=19, NotChecked=0, Total=3306 [2022-11-16 11:42:49,310 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 150 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:49,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 539 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 309 Invalid, 0 Unknown, 411 Unchecked, 0.3s Time] [2022-11-16 11:42:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-16 11:42:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2022-11-16 11:42:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 149 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2022-11-16 11:42:49,316 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 28 [2022-11-16 11:42:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:49,317 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2022-11-16 11:42:49,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2022-11-16 11:42:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:42:49,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:49,318 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:49,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:49,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 11:42:49,524 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2025170382, now seen corresponding path program 2 times [2022-11-16 11:42:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:49,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148775818] [2022-11-16 11:42:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:50,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:50,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148775818] [2022-11-16 11:42:50,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148775818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045946849] [2022-11-16 11:42:50,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:42:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:50,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:50,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:42:50,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:42:50,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:50,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:42:50,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:50,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:42:50,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:42:50,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:50,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 11:42:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:50,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:50,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:42:50,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:42:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:51,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045946849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:51,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:51,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2022-11-16 11:42:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979735340] [2022-11-16 11:42:51,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:42:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:51,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:42:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:42:51,412 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:52,791 INFO L93 Difference]: Finished difference Result 273 states and 302 transitions. [2022-11-16 11:42:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:42:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 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 30 [2022-11-16 11:42:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:52,793 INFO L225 Difference]: With dead ends: 273 [2022-11-16 11:42:52,793 INFO L226 Difference]: Without dead ends: 262 [2022-11-16 11:42:52,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=279, Invalid=2171, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:42:52,794 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 256 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:52,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 564 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 590 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2022-11-16 11:42:52,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-16 11:42:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2022-11-16 11:42:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 190 states have (on average 1.1473684210526316) internal successors, (218), 192 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2022-11-16 11:42:52,800 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 30 [2022-11-16 11:42:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:52,800 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2022-11-16 11:42:52,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2022-11-16 11:42:52,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:42:52,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:52,802 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:52,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:42:53,017 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1580697398, now seen corresponding path program 3 times [2022-11-16 11:42:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:53,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423835308] [2022-11-16 11:42:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:53,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:53,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423835308] [2022-11-16 11:42:53,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423835308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:53,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963988529] [2022-11-16 11:42:53,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:42:53,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:53,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:53,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:53,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:42:53,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:42:53,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:53,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:42:53,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:53,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:53,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:42:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:54,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963988529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:54,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:54,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-16 11:42:54,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782412948] [2022-11-16 11:42:54,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:54,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:42:54,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:42:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:42:54,005 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:54,605 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-11-16 11:42:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:42:54,606 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 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 32 [2022-11-16 11:42:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:54,607 INFO L225 Difference]: With dead ends: 205 [2022-11-16 11:42:54,607 INFO L226 Difference]: Without dead ends: 205 [2022-11-16 11:42:54,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:42:54,608 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 187 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:54,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 448 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:42:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-16 11:42:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 198. [2022-11-16 11:42:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 195 states have (on average 1.1435897435897435) internal successors, (223), 197 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 223 transitions. [2022-11-16 11:42:54,617 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 223 transitions. Word has length 32 [2022-11-16 11:42:54,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:54,618 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 223 transitions. [2022-11-16 11:42:54,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 223 transitions. [2022-11-16 11:42:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:42:54,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:54,619 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:54,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:54,825 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:42:54,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:54,826 INFO L85 PathProgramCache]: Analyzing trace with hash 603565394, now seen corresponding path program 4 times [2022-11-16 11:42:54,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:54,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709968747] [2022-11-16 11:42:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:55,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:55,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709968747] [2022-11-16 11:42:55,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709968747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:55,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092747914] [2022-11-16 11:42:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:42:55,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:55,956 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:55,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:42:56,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:42:56,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:56,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 11:42:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:56,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:42:56,342 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-16 11:42:56,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-16 11:42:56,868 INFO L321 Elim1Store]: treesize reduction 63, result has 44.2 percent of original size [2022-11-16 11:42:56,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 68 [2022-11-16 11:42:57,800 INFO L321 Elim1Store]: treesize reduction 83, result has 42.8 percent of original size [2022-11-16 11:42:57,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 111 [2022-11-16 11:42:59,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:59,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 160 [2022-11-16 11:43:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:43:00,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:17,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 3439 treesize of output 3381 [2022-11-16 11:43:17,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:43:17,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 25 [2022-11-16 11:43:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:43:27,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092747914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:27,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:43:27,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 54 [2022-11-16 11:43:27,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524961973] [2022-11-16 11:43:27,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:27,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 11:43:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 11:43:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2639, Unknown=7, NotChecked=0, Total=2862 [2022-11-16 11:43:27,158 INFO L87 Difference]: Start difference. First operand 198 states and 223 transitions. Second operand has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 54 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:19,150 WARN L233 SmtUtils]: Spent 50.22s on a formula simplification. DAG size of input: 72 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:44:22,095 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (and (or (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0)) .cse0) (or (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (not .cse0)) (not (< |c_ULTIMATE.start_main_~length1~0#1| 1)) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (or (< (select |c_#length| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 3)) (forall ((v_ArrVal_518 Int) (v_ArrVal_516 Int) (|v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38| Int)) (let ((.cse1 (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~length3~0#1| (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset|) 0))) (let ((.cse2 (store .cse1 |ULTIMATE.start_main_~nondetString2~0#1.offset| v_ArrVal_516))) (or (not (<= 0 |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38|)) (<= (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38|) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38|) 0) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| .cse2) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38| 1)) 0) (= 0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store .cse2 (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 1) v_ArrVal_518)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38| 2))))))))))) is different from false [2022-11-16 11:44:40,279 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|))) (and (or (and (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 1)) .cse0) (or (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (not .cse0)) (not (< |c_ULTIMATE.start_main_~length1~0#1| 1)) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int)) (or (< (select |c_#length| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 3)) (forall ((v_ArrVal_518 Int) (v_ArrVal_516 Int) (|v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38| Int)) (let ((.cse1 (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~length3~0#1| (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset|) 0))) (let ((.cse2 (store .cse1 |ULTIMATE.start_main_~nondetString2~0#1.offset| v_ArrVal_516))) (or (not (<= 0 |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38|)) (<= (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38|) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| .cse1) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38|) 0) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| .cse2) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38| 1)) 0) (= 0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store .cse2 (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 1) v_ArrVal_518)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_38| 2))))))))))) is different from false [2022-11-16 11:44:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:44,491 INFO L93 Difference]: Finished difference Result 304 states and 338 transitions. [2022-11-16 11:44:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-16 11:44:44,492 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 54 states have internal predecessors, (94), 0 states have call successors, (0), 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 36 [2022-11-16 11:44:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:44,493 INFO L225 Difference]: With dead ends: 304 [2022-11-16 11:44:44,493 INFO L226 Difference]: Without dead ends: 268 [2022-11-16 11:44:44,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 95.8s TimeCoverageRelationStatistics Valid=637, Invalid=8475, Unknown=16, NotChecked=378, Total=9506 [2022-11-16 11:44:44,499 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:44,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 603 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 352 Invalid, 0 Unknown, 235 Unchecked, 0.4s Time] [2022-11-16 11:44:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-16 11:44:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 248. [2022-11-16 11:44:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 245 states have (on average 1.1346938775510205) internal successors, (278), 247 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 278 transitions. [2022-11-16 11:44:44,506 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 278 transitions. Word has length 36 [2022-11-16 11:44:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:44,506 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 278 transitions. [2022-11-16 11:44:44,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 54 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 278 transitions. [2022-11-16 11:44:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:44:44,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:44,507 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:44,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:44,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-16 11:44:44,714 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:44:44,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -541196940, now seen corresponding path program 3 times [2022-11-16 11:44:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:44,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003929701] [2022-11-16 11:44:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:45,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003929701] [2022-11-16 11:44:45,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003929701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:45,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346942120] [2022-11-16 11:44:45,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:44:45,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:45,328 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:45,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:44:45,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:44:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:44:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:44:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:45,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:44:46,134 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 11:44:46,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 11:44:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:46,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:46,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:44:46,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 11:44:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:46,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346942120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:46,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:46,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-11-16 11:44:46,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307287389] [2022-11-16 11:44:46,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:46,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:44:46,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:44:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:44:46,682 INFO L87 Difference]: Start difference. First operand 248 states and 278 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:49,149 INFO L93 Difference]: Finished difference Result 473 states and 517 transitions. [2022-11-16 11:44:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:44:49,150 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 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) Word has length 37 [2022-11-16 11:44:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:49,153 INFO L225 Difference]: With dead ends: 473 [2022-11-16 11:44:49,153 INFO L226 Difference]: Without dead ends: 459 [2022-11-16 11:44:49,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=311, Invalid=2551, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:44:49,155 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 346 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:49,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 737 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1399 Invalid, 0 Unknown, 166 Unchecked, 1.1s Time] [2022-11-16 11:44:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-16 11:44:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 300. [2022-11-16 11:44:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 297 states have (on average 1.1414141414141414) internal successors, (339), 299 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 339 transitions. [2022-11-16 11:44:49,165 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 339 transitions. Word has length 37 [2022-11-16 11:44:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:49,165 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 339 transitions. [2022-11-16 11:44:49,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 339 transitions. [2022-11-16 11:44:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 11:44:49,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:49,167 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:49,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:49,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:49,373 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:44:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:49,374 INFO L85 PathProgramCache]: Analyzing trace with hash -916383204, now seen corresponding path program 1 times [2022-11-16 11:44:49,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:49,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200031513] [2022-11-16 11:44:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:50,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:50,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200031513] [2022-11-16 11:44:50,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200031513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544919070] [2022-11-16 11:44:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:50,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:50,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:50,083 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:50,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:44:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:50,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 11:44:50,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:50,352 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:50,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:44:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:50,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:44:51,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544919070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:51,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:51,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2022-11-16 11:44:51,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675844942] [2022-11-16 11:44:51,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:51,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:44:51,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:51,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:44:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:44:51,800 INFO L87 Difference]: Start difference. First operand 300 states and 339 transitions. Second operand has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:56,509 INFO L93 Difference]: Finished difference Result 393 states and 430 transitions. [2022-11-16 11:44:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-16 11:44:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 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 39 [2022-11-16 11:44:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:56,512 INFO L225 Difference]: With dead ends: 393 [2022-11-16 11:44:56,512 INFO L226 Difference]: Without dead ends: 354 [2022-11-16 11:44:56,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1082, Invalid=4924, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 11:44:56,515 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 949 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:56,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 514 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:44:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-16 11:44:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 311. [2022-11-16 11:44:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 308 states have (on average 1.1233766233766234) internal successors, (346), 310 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 346 transitions. [2022-11-16 11:44:56,541 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 346 transitions. Word has length 39 [2022-11-16 11:44:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:56,541 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 346 transitions. [2022-11-16 11:44:56,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.026315789473684) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 346 transitions. [2022-11-16 11:44:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:44:56,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:56,543 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:56,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:56,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:56,749 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:44:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:56,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1665988438, now seen corresponding path program 2 times [2022-11-16 11:44:56,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:56,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467391073] [2022-11-16 11:44:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:56,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:57,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467391073] [2022-11-16 11:44:57,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467391073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:57,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023721739] [2022-11-16 11:44:57,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:44:57,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:57,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:57,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:57,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:44:57,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:44:57,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:44:57,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 11:44:57,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:57,823 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:57,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:44:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:58,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:59,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023721739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:59,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:59,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2022-11-16 11:44:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760380785] [2022-11-16 11:44:59,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:44:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:44:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:44:59,304 INFO L87 Difference]: Start difference. First operand 311 states and 346 transitions. Second operand has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:02,441 INFO L93 Difference]: Finished difference Result 440 states and 480 transitions. [2022-11-16 11:45:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:45:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 39 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 41 [2022-11-16 11:45:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:02,447 INFO L225 Difference]: With dead ends: 440 [2022-11-16 11:45:02,447 INFO L226 Difference]: Without dead ends: 440 [2022-11-16 11:45:02,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=807, Invalid=3353, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:45:02,451 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 732 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:02,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 573 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:45:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-16 11:45:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 303. [2022-11-16 11:45:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 300 states have (on average 1.1233333333333333) internal successors, (337), 302 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 337 transitions. [2022-11-16 11:45:02,469 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 337 transitions. Word has length 41 [2022-11-16 11:45:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:02,470 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 337 transitions. [2022-11-16 11:45:02,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 337 transitions. [2022-11-16 11:45:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:45:02,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:02,471 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:02,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:02,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 11:45:02,672 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:45:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2139029910, now seen corresponding path program 1 times [2022-11-16 11:45:02,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:02,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924496701] [2022-11-16 11:45:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:45:03,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:03,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924496701] [2022-11-16 11:45:03,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924496701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:03,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744206584] [2022-11-16 11:45:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:03,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:03,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:03,691 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:03,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:45:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:03,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 11:45:03,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:03,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:45:04,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:04,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:45:04,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:45:04,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:45:04,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:45:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:45:04,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:11,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:11,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:45:11,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:11,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:45:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:45:11,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744206584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:11,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:11,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 33 [2022-11-16 11:45:11,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947435776] [2022-11-16 11:45:11,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:11,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:45:11,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:11,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:45:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=894, Unknown=53, NotChecked=0, Total=1056 [2022-11-16 11:45:11,414 INFO L87 Difference]: Start difference. First operand 303 states and 337 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:12,100 INFO L93 Difference]: Finished difference Result 386 states and 422 transitions. [2022-11-16 11:45:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:45:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 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) Word has length 43 [2022-11-16 11:45:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:12,102 INFO L225 Difference]: With dead ends: 386 [2022-11-16 11:45:12,102 INFO L226 Difference]: Without dead ends: 346 [2022-11-16 11:45:12,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=204, Invalid=1383, Unknown=53, NotChecked=0, Total=1640 [2022-11-16 11:45:12,103 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 155 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:12,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 647 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 321 Invalid, 0 Unknown, 212 Unchecked, 0.3s Time] [2022-11-16 11:45:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-16 11:45:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 327. [2022-11-16 11:45:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 324 states have (on average 1.1203703703703705) internal successors, (363), 326 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 363 transitions. [2022-11-16 11:45:12,112 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 363 transitions. Word has length 43 [2022-11-16 11:45:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:12,113 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 363 transitions. [2022-11-16 11:45:12,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 363 transitions. [2022-11-16 11:45:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:45:12,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:12,114 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:12,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 11:45:12,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-16 11:45:12,320 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:45:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash -203339112, now seen corresponding path program 4 times [2022-11-16 11:45:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:12,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048051011] [2022-11-16 11:45:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:12,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:12,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048051011] [2022-11-16 11:45:12,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048051011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:12,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089421638] [2022-11-16 11:45:12,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:45:12,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:12,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:12,999 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:13,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:45:13,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:45:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:13,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 11:45:13,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:13,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:30,145 INFO L321 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2022-11-16 11:45:30,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 42 [2022-11-16 11:45:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 32 refuted. 10 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:30,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:39,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-11-16 11:45:39,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:39,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 74 treesize of output 56 [2022-11-16 11:45:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 35 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:39,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089421638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:39,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:39,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 58 [2022-11-16 11:45:39,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321924802] [2022-11-16 11:45:39,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:39,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 11:45:39,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 11:45:39,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2975, Unknown=19, NotChecked=0, Total=3306 [2022-11-16 11:45:39,673 INFO L87 Difference]: Start difference. First operand 327 states and 363 transitions. Second operand has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 58 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:12,896 INFO L93 Difference]: Finished difference Result 446 states and 496 transitions. [2022-11-16 11:46:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 11:46:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 58 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-16 11:46:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:12,899 INFO L225 Difference]: With dead ends: 446 [2022-11-16 11:46:12,899 INFO L226 Difference]: Without dead ends: 429 [2022-11-16 11:46:12,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 58.7s TimeCoverageRelationStatistics Valid=985, Invalid=8492, Unknown=29, NotChecked=0, Total=9506 [2022-11-16 11:46:12,902 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 387 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:12,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 381 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 731 Invalid, 0 Unknown, 53 Unchecked, 0.6s Time] [2022-11-16 11:46:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-16 11:46:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 406. [2022-11-16 11:46:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 403 states have (on average 1.1240694789081886) internal successors, (453), 405 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 453 transitions. [2022-11-16 11:46:12,910 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 453 transitions. Word has length 44 [2022-11-16 11:46:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:12,911 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 453 transitions. [2022-11-16 11:46:12,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 58 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 453 transitions. [2022-11-16 11:46:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:46:12,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:12,912 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:12,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:13,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 11:46:13,118 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:46:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:13,119 INFO L85 PathProgramCache]: Analyzing trace with hash -191253797, now seen corresponding path program 1 times [2022-11-16 11:46:13,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:13,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725680761] [2022-11-16 11:46:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:13,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725680761] [2022-11-16 11:46:14,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725680761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432199418] [2022-11-16 11:46:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:14,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:14,468 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:14,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:46:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:14,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 11:46:14,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:14,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:46:14,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:46:15,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:46:15,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:46:15,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:15,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:46:15,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:46:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:15,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:15,548 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-11-16 11:46:19,797 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-11-16 11:46:19,809 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_765 (Array Int Int)) (v_ArrVal_767 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_765) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-11-16 11:46:19,821 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_767) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-11-16 11:46:19,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:19,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:46:19,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:19,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:46:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2022-11-16 11:46:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432199418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:20,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:20,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 43 [2022-11-16 11:46:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200291714] [2022-11-16 11:46:20,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:20,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 11:46:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:20,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 11:46:20,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1339, Unknown=44, NotChecked=308, Total=1806 [2022-11-16 11:46:20,254 INFO L87 Difference]: Start difference. First operand 406 states and 453 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:22,043 INFO L93 Difference]: Finished difference Result 516 states and 574 transitions. [2022-11-16 11:46:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:46:22,044 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-16 11:46:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:22,046 INFO L225 Difference]: With dead ends: 516 [2022-11-16 11:46:22,046 INFO L226 Difference]: Without dead ends: 472 [2022-11-16 11:46:22,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=223, Invalid=2502, Unknown=47, NotChecked=420, Total=3192 [2022-11-16 11:46:22,047 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 135 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:22,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 925 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 666 Invalid, 0 Unknown, 414 Unchecked, 0.5s Time] [2022-11-16 11:46:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-16 11:46:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 461. [2022-11-16 11:46:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 458 states have (on average 1.1222707423580787) internal successors, (514), 460 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 514 transitions. [2022-11-16 11:46:22,058 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 514 transitions. Word has length 44 [2022-11-16 11:46:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:22,058 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 514 transitions. [2022-11-16 11:46:22,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 514 transitions. [2022-11-16 11:46:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:46:22,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:22,060 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:22,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:22,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:22,266 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:46:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:22,266 INFO L85 PathProgramCache]: Analyzing trace with hash 435491443, now seen corresponding path program 2 times [2022-11-16 11:46:22,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:22,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726638195] [2022-11-16 11:46:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:46:22,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:22,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726638195] [2022-11-16 11:46:22,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726638195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:22,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131919014] [2022-11-16 11:46:22,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:46:22,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:22,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:22,751 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:22,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:46:22,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:46:22,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:22,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 11:46:22,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:46:23,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:23,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:46:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:46:23,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131919014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:23,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:23,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-11-16 11:46:23,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737472990] [2022-11-16 11:46:23,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:23,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:46:23,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:23,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:46:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:46:23,550 INFO L87 Difference]: Start difference. First operand 461 states and 514 transitions. Second operand has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:24,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:24,465 INFO L93 Difference]: Finished difference Result 508 states and 555 transitions. [2022-11-16 11:46:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:46:24,466 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-16 11:46:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:24,469 INFO L225 Difference]: With dead ends: 508 [2022-11-16 11:46:24,469 INFO L226 Difference]: Without dead ends: 508 [2022-11-16 11:46:24,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:46:24,470 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 266 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:24,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 618 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:46:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-16 11:46:24,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 476. [2022-11-16 11:46:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 473 states have (on average 1.120507399577167) internal successors, (530), 475 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 530 transitions. [2022-11-16 11:46:24,482 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 530 transitions. Word has length 47 [2022-11-16 11:46:24,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:24,482 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 530 transitions. [2022-11-16 11:46:24,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 530 transitions. [2022-11-16 11:46:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:46:24,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:24,488 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:24,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:24,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 11:46:24,694 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:46:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1461338722, now seen corresponding path program 2 times [2022-11-16 11:46:24,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:24,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783646309] [2022-11-16 11:46:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:24,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:25,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:25,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783646309] [2022-11-16 11:46:25,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783646309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:25,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410509587] [2022-11-16 11:46:25,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:46:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:25,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:25,311 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:25,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:46:25,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:46:25,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:46:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:25,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:26,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:46:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:26,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410509587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:26,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:26,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-11-16 11:46:26,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452981683] [2022-11-16 11:46:26,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:26,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:46:26,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:46:26,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:46:26,360 INFO L87 Difference]: Start difference. First operand 476 states and 530 transitions. Second operand has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 31 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:27,584 INFO L93 Difference]: Finished difference Result 614 states and 673 transitions. [2022-11-16 11:46:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:46:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 31 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 48 [2022-11-16 11:46:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:27,587 INFO L225 Difference]: With dead ends: 614 [2022-11-16 11:46:27,587 INFO L226 Difference]: Without dead ends: 614 [2022-11-16 11:46:27,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=414, Invalid=1748, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:46:27,588 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 341 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:27,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 697 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:46:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-16 11:46:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 524. [2022-11-16 11:46:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 521 states have (on average 1.1324376199616122) internal successors, (590), 523 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 590 transitions. [2022-11-16 11:46:27,601 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 590 transitions. Word has length 48 [2022-11-16 11:46:27,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:27,601 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 590 transitions. [2022-11-16 11:46:27,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 31 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 590 transitions. [2022-11-16 11:46:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 11:46:27,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:27,603 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:27,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:27,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:27,809 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:46:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1424251762, now seen corresponding path program 5 times [2022-11-16 11:46:27,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:27,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033230600] [2022-11-16 11:46:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:27,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:28,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033230600] [2022-11-16 11:46:28,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033230600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:28,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756317755] [2022-11-16 11:46:28,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:46:28,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:28,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:28,558 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:28,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:46:28,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-16 11:46:28,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:28,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 11:46:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:28,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:46:29,635 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 11:46:29,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 11:46:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:29,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:30,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-16 11:46:30,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 11:46:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:30,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756317755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:30,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:30,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-11-16 11:46:30,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834340218] [2022-11-16 11:46:30,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 11:46:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 11:46:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 11:46:30,384 INFO L87 Difference]: Start difference. First operand 524 states and 590 transitions. Second operand has 44 states, 44 states have (on average 2.8181818181818183) internal successors, (124), 44 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:33,824 INFO L93 Difference]: Finished difference Result 1101 states and 1202 transitions. [2022-11-16 11:46:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 11:46:33,824 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.8181818181818183) internal successors, (124), 44 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 51 [2022-11-16 11:46:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:33,828 INFO L225 Difference]: With dead ends: 1101 [2022-11-16 11:46:33,828 INFO L226 Difference]: Without dead ends: 1081 [2022-11-16 11:46:33,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=370, Invalid=4186, Unknown=0, NotChecked=0, Total=4556 [2022-11-16 11:46:33,829 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 478 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 2514 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:33,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1441 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2514 Invalid, 0 Unknown, 448 Unchecked, 1.8s Time] [2022-11-16 11:46:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2022-11-16 11:46:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 627. [2022-11-16 11:46:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 624 states have (on average 1.142628205128205) internal successors, (713), 626 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 713 transitions. [2022-11-16 11:46:33,846 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 713 transitions. Word has length 51 [2022-11-16 11:46:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:33,847 INFO L495 AbstractCegarLoop]: Abstraction has 627 states and 713 transitions. [2022-11-16 11:46:33,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.8181818181818183) internal successors, (124), 44 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 713 transitions. [2022-11-16 11:46:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 11:46:33,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:33,848 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:33,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-16 11:46:34,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:34,054 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:46:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash 461326971, now seen corresponding path program 3 times [2022-11-16 11:46:34,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:34,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769815457] [2022-11-16 11:46:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:46:35,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:35,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769815457] [2022-11-16 11:46:35,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769815457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:35,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503105295] [2022-11-16 11:46:35,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:46:35,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:35,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:35,160 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:35,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:46:35,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:46:35,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:35,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 11:46:35,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:35,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:46:35,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:46:35,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:46:35,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:46:36,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:36,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:46:36,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:46:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:46:36,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:36,154 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_961 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_961) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-11-16 11:46:36,163 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_961 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_961) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-11-16 11:46:47,247 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_961 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_961) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-16 11:46:47,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:47,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:46:47,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:47,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:46:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2022-11-16 11:46:47,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503105295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:47,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:47,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 40 [2022-11-16 11:46:47,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729004779] [2022-11-16 11:46:47,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:47,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:46:47,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:46:47,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1176, Unknown=44, NotChecked=216, Total=1560 [2022-11-16 11:46:47,564 INFO L87 Difference]: Start difference. First operand 627 states and 713 transitions. Second operand has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:49,218 INFO L93 Difference]: Finished difference Result 698 states and 777 transitions. [2022-11-16 11:46:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:46:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 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 51 [2022-11-16 11:46:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:49,227 INFO L225 Difference]: With dead ends: 698 [2022-11-16 11:46:49,227 INFO L226 Difference]: Without dead ends: 674 [2022-11-16 11:46:49,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=294, Invalid=2326, Unknown=44, NotChecked=306, Total=2970 [2022-11-16 11:46:49,228 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 176 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 562 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:49,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1371 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 929 Invalid, 0 Unknown, 562 Unchecked, 0.7s Time] [2022-11-16 11:46:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-16 11:46:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 634. [2022-11-16 11:46:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 631 states have (on average 1.133122028526149) internal successors, (715), 633 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 715 transitions. [2022-11-16 11:46:49,240 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 715 transitions. Word has length 51 [2022-11-16 11:46:49,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:49,240 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 715 transitions. [2022-11-16 11:46:49,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 715 transitions. [2022-11-16 11:46:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 11:46:49,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:49,250 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:49,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:49,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-16 11:46:49,455 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:46:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash 511731750, now seen corresponding path program 3 times [2022-11-16 11:46:49,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:49,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711021495] [2022-11-16 11:46:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:49,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:50,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711021495] [2022-11-16 11:46:50,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711021495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322447280] [2022-11-16 11:46:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:46:50,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:50,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:50,832 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:50,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:46:51,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:46:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-16 11:46:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:51,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:46:51,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:46:51,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:46:52,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-16 11:46:52,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:46:52,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:52,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:53,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:53,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:46:53,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:53,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:46:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:53,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:53,252 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1023 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1023) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2022-11-16 11:46:53,378 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1023 (Array Int Int)) (v_ArrVal_1022 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1022) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1023) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2022-11-16 11:46:53,390 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1023 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1023) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-11-16 11:46:53,408 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1023 (Array Int Int)) (v_ArrVal_1021 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1021) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1023) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-11-16 11:46:53,438 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1023 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1023) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~append#1.offset|)))) is different from false [2022-11-16 11:46:57,653 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1023 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1023) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~append#1.offset|)) 0)) is different from false [2022-11-16 11:46:57,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-16 11:46:58,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:58,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:46:58,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:58,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:46:58,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:46:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 34 not checked. [2022-11-16 11:46:58,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322447280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:58,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:58,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 24] total 64 [2022-11-16 11:46:58,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742320411] [2022-11-16 11:46:58,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:58,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 11:46:58,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:58,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 11:46:58,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3070, Unknown=43, NotChecked=702, Total=4032 [2022-11-16 11:46:58,610 INFO L87 Difference]: Start difference. First operand 634 states and 715 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:00,420 INFO L93 Difference]: Finished difference Result 756 states and 850 transitions. [2022-11-16 11:47:00,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:47:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-16 11:47:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:00,423 INFO L225 Difference]: With dead ends: 756 [2022-11-16 11:47:00,423 INFO L226 Difference]: Without dead ends: 704 [2022-11-16 11:47:00,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 6 IntricatePredicates, 6 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=336, Invalid=4899, Unknown=45, NotChecked=882, Total=6162 [2022-11-16 11:47:00,425 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 95 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 724 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:00,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1448 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 695 Invalid, 0 Unknown, 724 Unchecked, 0.5s Time] [2022-11-16 11:47:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-11-16 11:47:00,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 698. [2022-11-16 11:47:00,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 695 states have (on average 1.1309352517985611) internal successors, (786), 697 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 786 transitions. [2022-11-16 11:47:00,438 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 786 transitions. Word has length 52 [2022-11-16 11:47:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:00,438 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 786 transitions. [2022-11-16 11:47:00,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 786 transitions. [2022-11-16 11:47:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 11:47:00,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:00,441 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:00,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:00,648 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:47:00,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:00,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1083226314, now seen corresponding path program 2 times [2022-11-16 11:47:00,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:00,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761436972] [2022-11-16 11:47:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:01,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:01,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761436972] [2022-11-16 11:47:01,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761436972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:01,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791078656] [2022-11-16 11:47:01,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:47:01,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:01,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:01,576 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:01,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:47:01,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:47:01,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:01,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 11:47:01,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:01,899 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:47:01,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-16 11:47:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:03,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:05,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791078656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:05,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:05,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 54 [2022-11-16 11:47:05,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776730724] [2022-11-16 11:47:05,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:05,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 11:47:05,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:05,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 11:47:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2656, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:47:05,669 INFO L87 Difference]: Start difference. First operand 698 states and 786 transitions. Second operand has 55 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 55 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:17,796 INFO L93 Difference]: Finished difference Result 1069 states and 1155 transitions. [2022-11-16 11:47:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 11:47:17,797 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 55 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 53 [2022-11-16 11:47:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:17,800 INFO L225 Difference]: With dead ends: 1069 [2022-11-16 11:47:17,800 INFO L226 Difference]: Without dead ends: 953 [2022-11-16 11:47:17,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2457, Invalid=10199, Unknown=0, NotChecked=0, Total=12656 [2022-11-16 11:47:17,802 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 1086 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:17,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 866 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:47:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-11-16 11:47:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 648. [2022-11-16 11:47:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 645 states have (on average 1.1069767441860465) internal successors, (714), 647 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 714 transitions. [2022-11-16 11:47:17,816 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 714 transitions. Word has length 53 [2022-11-16 11:47:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:17,817 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 714 transitions. [2022-11-16 11:47:17,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 55 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 714 transitions. [2022-11-16 11:47:17,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:47:17,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:17,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2022-11-16 11:47:17,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:18,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-16 11:47:18,026 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:47:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:18,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1678205370, now seen corresponding path program 3 times [2022-11-16 11:47:18,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:18,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382931169] [2022-11-16 11:47:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:18,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:19,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382931169] [2022-11-16 11:47:19,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382931169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:19,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176808264] [2022-11-16 11:47:19,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:47:19,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:19,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:19,068 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:19,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:47:19,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:47:19,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:19,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 11:47:19,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:19,586 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:47:19,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-16 11:47:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:21,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:23,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176808264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:23,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:23,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 50 [2022-11-16 11:47:23,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102349537] [2022-11-16 11:47:23,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:23,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:47:23,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:47:23,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:47:23,083 INFO L87 Difference]: Start difference. First operand 648 states and 714 transitions. Second operand has 51 states, 50 states have (on average 3.26) internal successors, (163), 51 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:33,025 INFO L93 Difference]: Finished difference Result 968 states and 1034 transitions. [2022-11-16 11:47:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 11:47:33,026 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.26) internal successors, (163), 51 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-16 11:47:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:33,028 INFO L225 Difference]: With dead ends: 968 [2022-11-16 11:47:33,028 INFO L226 Difference]: Without dead ends: 913 [2022-11-16 11:47:33,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2095 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=2032, Invalid=8680, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 11:47:33,030 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1056 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:33,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 722 Invalid, 1890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:47:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-16 11:47:33,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 654. [2022-11-16 11:47:33,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 651 states have (on average 1.109062980030722) internal successors, (722), 653 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 722 transitions. [2022-11-16 11:47:33,045 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 722 transitions. Word has length 55 [2022-11-16 11:47:33,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:33,046 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 722 transitions. [2022-11-16 11:47:33,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.26) internal successors, (163), 51 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 722 transitions. [2022-11-16 11:47:33,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:47:33,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:33,048 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:33,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 11:47:33,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-16 11:47:33,255 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 11:47:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1665335273, now seen corresponding path program 4 times [2022-11-16 11:47:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:33,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152311148] [2022-11-16 11:47:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:33,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:33,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152311148] [2022-11-16 11:47:33,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152311148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:33,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092281396] [2022-11-16 11:47:33,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:47:33,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:33,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:33,965 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:33,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2656a593-e9ef-4d49-b210-ffb1f3dbac90/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:47:34,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:47:34,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:34,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-16 11:47:34,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:34,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:47:34,366 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-16 11:47:34,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:47:35,017 INFO L321 Elim1Store]: treesize reduction 78, result has 51.9 percent of original size [2022-11-16 11:47:35,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 100 [2022-11-16 11:47:36,835 INFO L321 Elim1Store]: treesize reduction 74, result has 49.0 percent of original size [2022-11-16 11:47:36,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 139 [2022-11-16 11:47:41,991 INFO L321 Elim1Store]: treesize reduction 121, result has 67.2 percent of original size [2022-11-16 11:47:41,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 201 treesize of output 399