./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8 --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 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- 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-2329fc7 [2022-12-13 15:41:03,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:41:03,800 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:41:03,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:41:03,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:41:03,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:41:03,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:41:03,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:41:03,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:41:03,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:41:03,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:41:03,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:41:03,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:41:03,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:41:03,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:41:03,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:41:03,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:41:03,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:41:03,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:41:03,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:41:03,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:41:03,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:41:03,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:41:03,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:41:03,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:41:03,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:41:03,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:41:03,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:41:03,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:41:03,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:41:03,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:41:03,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:41:03,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:41:03,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:41:03,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:41:03,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:41:03,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:41:03,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:41:03,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:41:03,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:41:03,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:41:03,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:41:03,875 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:41:03,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:41:03,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:41:03,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:41:03,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:41:03,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:41:03,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:41:03,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:41:03,877 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:41:03,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:41:03,878 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:41:03,878 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:41:03,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:41:03,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:41:03,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:41:03,879 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:41:03,879 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:41:03,879 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:41:03,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:41:03,879 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:41:03,880 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:41:03,880 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:41:03,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:41:03,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:41:03,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:41:03,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:41:03,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:41:03,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:41:03,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:41:03,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:41:03,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:41:03,882 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:41:03,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:41:03,882 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:41:03,882 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2022-12-13 15:41:04,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:41:04,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:41:04,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:41:04,080 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:41:04,080 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:41:04,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-12-13 15:41:06,666 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:41:06,832 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:41:06,833 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-12-13 15:41:06,840 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/data/55f17581f/ec9ca16b999143d6bcd5f89defafcb63/FLAGa24131216 [2022-12-13 15:41:06,850 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/data/55f17581f/ec9ca16b999143d6bcd5f89defafcb63 [2022-12-13 15:41:06,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:41:06,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:41:06,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:41:06,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:41:06,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:41:06,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:41:06" (1/1) ... [2022-12-13 15:41:06,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1b7892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:06, skipping insertion in model container [2022-12-13 15:41:06,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:41:06" (1/1) ... [2022-12-13 15:41:06,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:41:06,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:41:07,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:41:07,070 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:41:07,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:41:07,122 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:41:07,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07 WrapperNode [2022-12-13 15:41:07,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:41:07,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:41:07,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:41:07,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:41:07,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,159 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-12-13 15:41:07,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:41:07,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:41:07,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:41:07,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:41:07,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,181 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:41:07,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:41:07,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:41:07,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:41:07,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (1/1) ... [2022-12-13 15:41:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:41:07,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:07,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:41:07,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:41:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:41:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:41:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:41:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:41:07,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:41:07,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:41:07,324 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:41:07,325 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:41:07,479 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:41:07,485 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:41:07,486 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:41:07,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:41:07 BoogieIcfgContainer [2022-12-13 15:41:07,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:41:07,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:41:07,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:41:07,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:41:07,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:41:06" (1/3) ... [2022-12-13 15:41:07,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6fe46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:41:07, skipping insertion in model container [2022-12-13 15:41:07,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:41:07" (2/3) ... [2022-12-13 15:41:07,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6fe46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:41:07, skipping insertion in model container [2022-12-13 15:41:07,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:41:07" (3/3) ... [2022-12-13 15:41:07,497 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2022-12-13 15:41:07,514 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:41:07,514 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-13 15:41:07,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:41:07,552 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=PETRI_NET, 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;@74b5734c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:41:07,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-12-13 15:41:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:41:07,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:07,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:07,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:07,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:07,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-12-13 15:41:07,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:07,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433746451] [2022-12-13 15:41:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:07,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:07,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:07,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433746451] [2022-12-13 15:41:07,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433746451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:07,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:07,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:41:07,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159624490] [2022-12-13 15:41:07,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:07,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:41:07,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:41:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:41:07,799 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-12-13 15:41:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:07,842 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-12-13 15:41:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:41:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-12-13 15:41:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:07,852 INFO L225 Difference]: With dead ends: 76 [2022-12-13 15:41:07,853 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 15:41:07,854 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 [2022-12-13 15:41:07,857 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 69 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:07,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 15:41:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2022-12-13 15:41:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6333333333333333) 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) [2022-12-13 15:41:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-12-13 15:41:07,888 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2022-12-13 15:41:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:07,888 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-12-13 15:41:07,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-12-13 15:41:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-12-13 15:41:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:41:07,889 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:07,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:07,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:41:07,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:07,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-12-13 15:41:07,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:07,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395859279] [2022-12-13 15:41:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:07,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:08,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:08,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395859279] [2022-12-13 15:41:08,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395859279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:08,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:08,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:41:08,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950797947] [2022-12-13 15:41:08,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:08,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:41:08,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:08,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:41:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:41:08,152 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-12-13 15:41:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:08,220 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-12-13 15:41:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:41:08,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 [2022-12-13 15:41:08,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:08,222 INFO L225 Difference]: With dead ends: 77 [2022-12-13 15:41:08,222 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 15:41:08,222 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 [2022-12-13 15:41:08,223 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:08,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 51 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 15:41:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2022-12-13 15:41:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-12-13 15:41:08,227 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2022-12-13 15:41:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:08,227 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-12-13 15:41:08,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-12-13 15:41:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-12-13 15:41:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:41:08,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:08,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:08,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:41:08,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-12-13 15:41:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:08,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853231103] [2022-12-13 15:41:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:08,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:08,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:08,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853231103] [2022-12-13 15:41:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853231103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:08,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:08,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:41:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157295687] [2022-12-13 15:41:08,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:08,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:41:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:41:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:41:08,347 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2022-12-13 15:41:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:08,435 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-12-13 15:41:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:41:08,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2022-12-13 15:41:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:08,436 INFO L225 Difference]: With dead ends: 73 [2022-12-13 15:41:08,436 INFO L226 Difference]: Without dead ends: 73 [2022-12-13 15:41:08,437 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 [2022-12-13 15:41:08,438 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:08,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 71 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-13 15:41:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2022-12-13 15:41:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.5625) internal successors, (50), 42 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) [2022-12-13 15:41:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-13 15:41:08,443 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 7 [2022-12-13 15:41:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:08,444 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-13 15:41:08,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2022-12-13 15:41:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-13 15:41:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:41:08,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:08,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:08,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:41:08,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:08,445 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-12-13 15:41:08,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:08,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020408433] [2022-12-13 15:41:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:08,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:08,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:08,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020408433] [2022-12-13 15:41:08,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020408433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:08,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:08,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:41:08,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601406296] [2022-12-13 15:41:08,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:08,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:41:08,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:08,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:41:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:41:08,575 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:08,605 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-12-13 15:41:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:41:08,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-13 15:41:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:08,606 INFO L225 Difference]: With dead ends: 70 [2022-12-13 15:41:08,607 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 15:41:08,607 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 [2022-12-13 15:41:08,608 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:08,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 68 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 15:41:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2022-12-13 15:41:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.5526315789473684) 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) [2022-12-13 15:41:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-12-13 15:41:08,613 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 9 [2022-12-13 15:41:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:08,613 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-12-13 15:41:08,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-12-13 15:41:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:41:08,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:08,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:08,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:41:08,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-12-13 15:41:08,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:08,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340585576] [2022-12-13 15:41:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:08,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:08,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340585576] [2022-12-13 15:41:08,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340585576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:08,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:08,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:41:08,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091934883] [2022-12-13 15:41:08,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:08,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:41:08,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:41:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:41:08,649 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:08,663 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-12-13 15:41:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:41:08,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-13 15:41:08,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:08,664 INFO L225 Difference]: With dead ends: 85 [2022-12-13 15:41:08,664 INFO L226 Difference]: Without dead ends: 85 [2022-12-13 15:41:08,664 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 [2022-12-13 15:41:08,665 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 51 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 80 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 [2022-12-13 15:41:08,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 80 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-13 15:41:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2022-12-13 15:41:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 61 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) [2022-12-13 15:41:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-12-13 15:41:08,671 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 9 [2022-12-13 15:41:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:08,671 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-12-13 15:41:08,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-12-13 15:41:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:41:08,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:08,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:41:08,672 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-12-13 15:41:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:08,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759357959] [2022-12-13 15:41:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:08,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:08,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:08,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759357959] [2022-12-13 15:41:08,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759357959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:08,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:08,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:41:08,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507096192] [2022-12-13 15:41:08,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:08,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:41:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:08,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:41:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:41:08,736 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:08,756 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-12-13 15:41:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:41:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-13 15:41:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:08,757 INFO L225 Difference]: With dead ends: 60 [2022-12-13 15:41:08,757 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 15:41:08,757 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 [2022-12-13 15:41:08,757 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:08,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 15:41:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-13 15:41:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.411764705882353) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-12-13 15:41:08,761 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 9 [2022-12-13 15:41:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:08,761 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-12-13 15:41:08,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-12-13 15:41:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:41:08,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:08,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:41:08,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-12-13 15:41:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:08,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266039040] [2022-12-13 15:41:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:08,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:08,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:08,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266039040] [2022-12-13 15:41:08,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266039040] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:08,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:08,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:41:08,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815984609] [2022-12-13 15:41:08,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:08,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:41:08,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:08,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:41:08,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:41:08,852 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:08,925 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-12-13 15:41:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:41:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-13 15:41:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:08,926 INFO L225 Difference]: With dead ends: 89 [2022-12-13 15:41:08,926 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 15:41:08,926 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 [2022-12-13 15:41:08,927 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:08,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 15:41:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-12-13 15:41:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-12-13 15:41:08,930 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2022-12-13 15:41:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:08,930 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-12-13 15:41:08,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-12-13 15:41:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:41:08,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:08,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:08,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:41:08,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:08,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-12-13 15:41:08,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:08,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204947663] [2022-12-13 15:41:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:08,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:09,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:09,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204947663] [2022-12-13 15:41:09,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204947663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:09,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:09,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:41:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727632732] [2022-12-13 15:41:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:09,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:41:09,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:41:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:41:09,058 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:09,126 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2022-12-13 15:41:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:41:09,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-13 15:41:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:09,128 INFO L225 Difference]: With dead ends: 97 [2022-12-13 15:41:09,128 INFO L226 Difference]: Without dead ends: 97 [2022-12-13 15:41:09,128 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 [2022-12-13 15:41:09,129 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:09,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 67 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-13 15:41:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2022-12-13 15:41:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-12-13 15:41:09,134 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2022-12-13 15:41:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:09,135 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-12-13 15:41:09,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-12-13 15:41:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 15:41:09,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:09,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:09,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:41:09,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-12-13 15:41:09,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:09,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362622583] [2022-12-13 15:41:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:09,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:09,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362622583] [2022-12-13 15:41:09,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362622583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:09,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:09,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:41:09,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67259851] [2022-12-13 15:41:09,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:09,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:41:09,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:09,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:41:09,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:41:09,351 INFO L87 Difference]: Start difference. First operand 64 states and 78 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) [2022-12-13 15:41:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:09,395 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2022-12-13 15:41:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:41:09,396 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 [2022-12-13 15:41:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:09,396 INFO L225 Difference]: With dead ends: 85 [2022-12-13 15:41:09,396 INFO L226 Difference]: Without dead ends: 85 [2022-12-13 15:41:09,397 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 [2022-12-13 15:41:09,397 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:09,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-13 15:41:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-12-13 15:41:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-12-13 15:41:09,400 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 10 [2022-12-13 15:41:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:09,400 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-12-13 15:41:09,401 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) [2022-12-13 15:41:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-12-13 15:41:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 15:41:09,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:09,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:09,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:41:09,402 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:09,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:09,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-12-13 15:41:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:09,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976641821] [2022-12-13 15:41:09,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:09,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:09,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:09,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976641821] [2022-12-13 15:41:09,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976641821] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:09,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:09,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:41:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959469175] [2022-12-13 15:41:09,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:09,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:41:09,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:41:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:41:09,480 INFO L87 Difference]: Start difference. First operand 67 states and 82 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) [2022-12-13 15:41:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:09,506 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-12-13 15:41:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:41:09,507 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 [2022-12-13 15:41:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:09,508 INFO L225 Difference]: With dead ends: 66 [2022-12-13 15:41:09,508 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 15:41:09,508 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 [2022-12-13 15:41:09,509 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 27 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 [2022-12-13 15:41:09,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 15:41:09,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-12-13 15:41:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.4) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-12-13 15:41:09,512 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 10 [2022-12-13 15:41:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:09,512 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-12-13 15:41:09,512 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) [2022-12-13 15:41:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-12-13 15:41:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 15:41:09,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:09,512 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:09,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:41:09,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:09,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-12-13 15:41:09,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:09,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339097275] [2022-12-13 15:41:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:09,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:09,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:09,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339097275] [2022-12-13 15:41:09,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339097275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:09,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362286789] [2022-12-13 15:41:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:09,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:09,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:09,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:09,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:41:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:41:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:09,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:41:09,788 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 [2022-12-13 15:41:09,798 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 [2022-12-13 15:41:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:09,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:09,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:41:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:10,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362286789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:10,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:10,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 15:41:10,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921045222] [2022-12-13 15:41:10,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:10,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:41:10,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:41:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:41:10,012 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:10,244 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-12-13 15:41:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:41:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-12-13 15:41:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:10,245 INFO L225 Difference]: With dead ends: 84 [2022-12-13 15:41:10,245 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 15:41:10,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:41:10,246 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 171 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:10,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 192 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 15:41:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2022-12-13 15:41:10,249 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) [2022-12-13 15:41:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-12-13 15:41:10,250 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 11 [2022-12-13 15:41:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:10,250 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-12-13 15:41:10,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-12-13 15:41:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 15:41:10,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:10,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:10,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:41:10,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 15:41:10,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446013, now seen corresponding path program 1 times [2022-12-13 15:41:10,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145778981] [2022-12-13 15:41:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:10,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:10,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:10,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145778981] [2022-12-13 15:41:10,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145778981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:10,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:10,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:41:10,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669297851] [2022-12-13 15:41:10,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:10,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:41:10,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:41:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:41:10,555 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2022-12-13 15:41:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:10,615 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-12-13 15:41:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:41:10,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 [2022-12-13 15:41:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:10,615 INFO L225 Difference]: With dead ends: 59 [2022-12-13 15:41:10,615 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 15:41:10,616 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 [2022-12-13 15:41:10,616 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:10,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 65 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 15:41:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-13 15:41:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-12-13 15:41:10,618 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 13 [2022-12-13 15:41:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:10,619 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-12-13 15:41:10,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2022-12-13 15:41:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-12-13 15:41:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 15:41:10,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:10,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:10,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:41:10,620 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446012, now seen corresponding path program 1 times [2022-12-13 15:41:10,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:10,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972890012] [2022-12-13 15:41:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:10,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:10,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:10,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972890012] [2022-12-13 15:41:10,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972890012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:10,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:10,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:41:10,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284530102] [2022-12-13 15:41:10,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:10,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:41:10,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:10,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:41:10,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:41:10,711 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2022-12-13 15:41:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:10,792 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-12-13 15:41:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:41:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 [2022-12-13 15:41:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:10,792 INFO L225 Difference]: With dead ends: 65 [2022-12-13 15:41:10,792 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 15:41:10,793 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 [2022-12-13 15:41:10,793 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 95 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:10,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 97 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 15:41:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-12-13 15:41:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-12-13 15:41:10,796 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 13 [2022-12-13 15:41:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:10,796 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-12-13 15:41:10,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2022-12-13 15:41:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-12-13 15:41:10,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 15:41:10,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:10,797 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:10,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:41:10,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:10,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-12-13 15:41:10,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:10,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014251191] [2022-12-13 15:41:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:10,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:10,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:10,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014251191] [2022-12-13 15:41:10,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014251191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:10,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897507614] [2022-12-13 15:41:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:10,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:10,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:10,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:10,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:41:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:11,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 15:41:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:11,042 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 15:41:11,042 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 [2022-12-13 15:41:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:11,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:11,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897507614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:11,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:11,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-13 15:41:11,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350158847] [2022-12-13 15:41:11,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:11,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:41:11,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:41:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:41:11,429 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:11,641 INFO L93 Difference]: Finished difference Result 108 states and 124 transitions. [2022-12-13 15:41:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:41:11,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2022-12-13 15:41:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:11,642 INFO L225 Difference]: With dead ends: 108 [2022-12-13 15:41:11,642 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 15:41:11,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:41:11,643 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 289 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:11,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 146 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 15:41:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 56. [2022-12-13 15:41:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-12-13 15:41:11,646 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 13 [2022-12-13 15:41:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:11,646 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-12-13 15:41:11,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-12-13 15:41:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 15:41:11,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:11,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:11,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:41:11,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:41:11,848 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1389200859, now seen corresponding path program 1 times [2022-12-13 15:41:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:11,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520065316] [2022-12-13 15:41:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:12,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:12,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520065316] [2022-12-13 15:41:12,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520065316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:12,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015906458] [2022-12-13 15:41:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:12,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:12,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:12,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:12,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:41:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:41:12,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:12,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:41:12,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-13 15:41:12,085 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 [2022-12-13 15:41:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:12,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:12,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:41:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:12,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015906458] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:12,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:41:12,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2022-12-13 15:41:12,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181166465] [2022-12-13 15:41:12,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:12,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:41:12,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:41:12,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:41:12,307 INFO L87 Difference]: Start difference. First operand 56 states and 66 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) [2022-12-13 15:41:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:12,392 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-12-13 15:41:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:41:12,392 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 [2022-12-13 15:41:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:12,393 INFO L225 Difference]: With dead ends: 57 [2022-12-13 15:41:12,393 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 15:41:12,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:41:12,394 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 39 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 [2022-12-13 15:41:12,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 39 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 15:41:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2022-12-13 15:41:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-12-13 15:41:12,396 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2022-12-13 15:41:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:12,396 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-12-13 15:41:12,396 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) [2022-12-13 15:41:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-12-13 15:41:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 15:41:12,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:12,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:12,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:41:12,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:41:12,598 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:12,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:12,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572955, now seen corresponding path program 1 times [2022-12-13 15:41:12,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:12,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967910092] [2022-12-13 15:41:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967910092] [2022-12-13 15:41:12,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967910092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:12,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:12,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:41:12,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59132221] [2022-12-13 15:41:12,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:12,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:41:12,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:41:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:41:12,642 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2022-12-13 15:41:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:12,687 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-12-13 15:41:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:41:12,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 [2022-12-13 15:41:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:12,687 INFO L225 Difference]: With dead ends: 45 [2022-12-13 15:41:12,687 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 15:41:12,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:41:12,688 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:12,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 15:41:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-12-13 15:41:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-12-13 15:41:12,690 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 16 [2022-12-13 15:41:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:12,690 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-12-13 15:41:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2022-12-13 15:41:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-12-13 15:41:12,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 15:41:12,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:12,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:12,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 15:41:12,691 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:12,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572954, now seen corresponding path program 1 times [2022-12-13 15:41:12,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:12,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242275472] [2022-12-13 15:41:12,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:12,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:12,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:12,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242275472] [2022-12-13 15:41:12,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242275472] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:12,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:12,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:41:12,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332874137] [2022-12-13 15:41:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:12,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:41:12,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:41:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:41:12,822 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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) [2022-12-13 15:41:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:12,898 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-12-13 15:41:12,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:41:12,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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 [2022-12-13 15:41:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:12,899 INFO L225 Difference]: With dead ends: 52 [2022-12-13 15:41:12,899 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 15:41:12,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:41:12,900 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:12,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:12,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 15:41:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-12-13 15:41:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-12-13 15:41:12,902 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 16 [2022-12-13 15:41:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:12,902 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-12-13 15:41:12,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 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) [2022-12-13 15:41:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-12-13 15:41:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 15:41:12,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:12,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:12,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:41:12,903 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2056472215, now seen corresponding path program 1 times [2022-12-13 15:41:12,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:12,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133504713] [2022-12-13 15:41:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:12,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:13,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133504713] [2022-12-13 15:41:13,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133504713] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:13,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:13,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:41:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381034314] [2022-12-13 15:41:13,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:41:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:41:13,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:41:13,047 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:13,061 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-12-13 15:41:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:41:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 15:41:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:13,062 INFO L225 Difference]: With dead ends: 45 [2022-12-13 15:41:13,062 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 15:41:13,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:41:13,063 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:13,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 15:41:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-13 15:41:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 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) [2022-12-13 15:41:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-13 15:41:13,065 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2022-12-13 15:41:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:13,065 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-13 15:41:13,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-13 15:41:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 15:41:13,066 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:13,066 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] [2022-12-13 15:41:13,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 15:41:13,066 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash 673920784, now seen corresponding path program 1 times [2022-12-13 15:41:13,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:13,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099020747] [2022-12-13 15:41:13,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:13,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:13,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:13,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099020747] [2022-12-13 15:41:13,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099020747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:13,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:13,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 15:41:13,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341441247] [2022-12-13 15:41:13,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:13,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:41:13,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:13,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:41:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:41:13,266 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-12-13 15:41:13,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:13,371 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-12-13 15:41:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:41:13,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 [2022-12-13 15:41:13,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:13,372 INFO L225 Difference]: With dead ends: 66 [2022-12-13 15:41:13,372 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 15:41:13,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:41:13,373 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:13,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 203 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:41:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 15:41:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-12-13 15:41:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-12-13 15:41:13,376 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2022-12-13 15:41:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:13,376 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-12-13 15:41:13,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-12-13 15:41:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-12-13 15:41:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 15:41:13,376 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:13,377 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] [2022-12-13 15:41:13,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 15:41:13,377 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash 673922962, now seen corresponding path program 1 times [2022-12-13 15:41:13,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:13,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267537823] [2022-12-13 15:41:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:13,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:13,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267537823] [2022-12-13 15:41:13,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267537823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:13,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:13,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 15:41:13,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126409266] [2022-12-13 15:41:13,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:13,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:41:13,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:41:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:41:13,516 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-12-13 15:41:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:13,680 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-12-13 15:41:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:41:13,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 [2022-12-13 15:41:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:13,681 INFO L225 Difference]: With dead ends: 96 [2022-12-13 15:41:13,681 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 15:41:13,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:41:13,682 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:13,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 184 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 15:41:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-12-13 15:41:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 71 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) [2022-12-13 15:41:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-12-13 15:41:13,685 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 21 [2022-12-13 15:41:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:13,685 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-12-13 15:41:13,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-12-13 15:41:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-12-13 15:41:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 15:41:13,686 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:13,686 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] [2022-12-13 15:41:13,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 15:41:13,686 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:13,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1320221744, now seen corresponding path program 1 times [2022-12-13 15:41:13,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:13,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009568633] [2022-12-13 15:41:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:13,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:13,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:13,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009568633] [2022-12-13 15:41:13,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009568633] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:13,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:13,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 15:41:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096567673] [2022-12-13 15:41:13,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:13,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:41:13,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:41:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:41:13,871 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-12-13 15:41:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:14,055 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-12-13 15:41:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:41:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 [2022-12-13 15:41:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:14,056 INFO L225 Difference]: With dead ends: 117 [2022-12-13 15:41:14,056 INFO L226 Difference]: Without dead ends: 106 [2022-12-13 15:41:14,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:41:14,057 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:14,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 168 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-13 15:41:14,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2022-12-13 15:41:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 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) [2022-12-13 15:41:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-12-13 15:41:14,059 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 21 [2022-12-13 15:41:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:14,059 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-12-13 15:41:14,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-12-13 15:41:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-12-13 15:41:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 15:41:14,060 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:14,060 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] [2022-12-13 15:41:14,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 15:41:14,060 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1015022958, now seen corresponding path program 1 times [2022-12-13 15:41:14,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:14,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082184792] [2022-12-13 15:41:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:14,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:14,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082184792] [2022-12-13 15:41:14,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082184792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:41:14,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:41:14,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 15:41:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893387727] [2022-12-13 15:41:14,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:41:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:41:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:41:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:41:14,351 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2022-12-13 15:41:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:14,895 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-12-13 15:41:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:41:14,895 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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 [2022-12-13 15:41:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:14,896 INFO L225 Difference]: With dead ends: 118 [2022-12-13 15:41:14,896 INFO L226 Difference]: Without dead ends: 105 [2022-12-13 15:41:14,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-12-13 15:41:14,897 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 116 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:14,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 200 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-13 15:41:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2022-12-13 15:41:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 75 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) [2022-12-13 15:41:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-12-13 15:41:14,899 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2022-12-13 15:41:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:14,899 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-12-13 15:41:14,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2022-12-13 15:41:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-12-13 15:41:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 15:41:14,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:14,899 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:14,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 15:41:14,900 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash -359665389, now seen corresponding path program 1 times [2022-12-13 15:41:14,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664376794] [2022-12-13 15:41:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:15,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:15,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664376794] [2022-12-13 15:41:15,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664376794] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:15,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112806978] [2022-12-13 15:41:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:15,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:15,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:41:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 15:41:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:15,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:15,416 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 [2022-12-13 15:41:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:15,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112806978] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:15,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:15,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-12-13 15:41:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277844897] [2022-12-13 15:41:15,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:41:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:41:15,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:41:15,440 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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) [2022-12-13 15:41:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:15,702 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-12-13 15:41:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:41:15,703 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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) Word has length 25 [2022-12-13 15:41:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:15,703 INFO L225 Difference]: With dead ends: 101 [2022-12-13 15:41:15,703 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 15:41:15,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 15:41:15,704 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 264 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:15,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 271 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 15:41:15,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2022-12-13 15:41:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 85 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) [2022-12-13 15:41:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-12-13 15:41:15,706 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 25 [2022-12-13 15:41:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:15,706 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-12-13 15:41:15,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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) [2022-12-13 15:41:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-12-13 15:41:15,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 15:41:15,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:15,706 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:15,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:41:15,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 15:41:15,908 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:15,910 INFO L85 PathProgramCache]: Analyzing trace with hash 501654165, now seen corresponding path program 1 times [2022-12-13 15:41:15,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:15,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765214960] [2022-12-13 15:41:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:15,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:16,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:16,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765214960] [2022-12-13 15:41:16,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765214960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:16,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150465361] [2022-12-13 15:41:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:16,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:16,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:16,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:16,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:41:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:16,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 15:41:16,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:16,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:16,382 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 [2022-12-13 15:41:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:16,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150465361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:16,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:16,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-13 15:41:16,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455584883] [2022-12-13 15:41:16,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:41:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:41:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:41:16,405 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:16,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:16,652 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2022-12-13 15:41:16,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:41:16,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 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 [2022-12-13 15:41:16,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:16,653 INFO L225 Difference]: With dead ends: 119 [2022-12-13 15:41:16,653 INFO L226 Difference]: Without dead ends: 119 [2022-12-13 15:41:16,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-12-13 15:41:16,654 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 181 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:16,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 321 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-13 15:41:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-12-13 15:41:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.158878504672897) internal successors, (124), 108 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) [2022-12-13 15:41:16,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2022-12-13 15:41:16,656 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 25 [2022-12-13 15:41:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:16,656 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2022-12-13 15:41:16,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2022-12-13 15:41:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 15:41:16,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:16,657 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:16,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:41:16,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:16,857 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:16,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:16,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1205551803, now seen corresponding path program 2 times [2022-12-13 15:41:16,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:16,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559323876] [2022-12-13 15:41:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:16,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559323876] [2022-12-13 15:41:17,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559323876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254703976] [2022-12-13 15:41:17,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:41:17,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:17,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:17,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:17,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:41:17,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:41:17,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 15:41:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:17,220 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 [2022-12-13 15:41:17,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:17,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-12-13 15:41:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:17,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:18,085 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 [2022-12-13 15:41:18,089 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 [2022-12-13 15:41:18,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 15:41:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:18,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254703976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:18,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:18,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2022-12-13 15:41:18,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376734332] [2022-12-13 15:41:18,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:18,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 15:41:18,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:18,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 15:41:18,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 15:41:18,114 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-12-13 15:41:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:20,786 INFO L93 Difference]: Finished difference Result 205 states and 224 transitions. [2022-12-13 15:41:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 15:41:20,787 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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 30 [2022-12-13 15:41:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:20,787 INFO L225 Difference]: With dead ends: 205 [2022-12-13 15:41:20,787 INFO L226 Difference]: Without dead ends: 189 [2022-12-13 15:41:20,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=935, Invalid=4765, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 15:41:20,788 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 410 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:20,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 587 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:41:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-12-13 15:41:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 163. [2022-12-13 15:41:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 162 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 184 transitions. [2022-12-13 15:41:20,791 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 184 transitions. Word has length 30 [2022-12-13 15:41:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:20,791 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 184 transitions. [2022-12-13 15:41:20,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-12-13 15:41:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 184 transitions. [2022-12-13 15:41:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 15:41:20,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:20,792 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, 1] [2022-12-13 15:41:20,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:41:20,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:20,994 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash -512582047, now seen corresponding path program 2 times [2022-12-13 15:41:20,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793937929] [2022-12-13 15:41:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:20,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:21,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793937929] [2022-12-13 15:41:21,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793937929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:21,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107726276] [2022-12-13 15:41:21,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:41:21,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:21,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:21,440 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:21,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:41:21,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:41:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 15:41:21,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:21,514 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 [2022-12-13 15:41:21,627 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 [2022-12-13 15:41:21,675 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 [2022-12-13 15:41:21,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:41:21,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:21,985 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 [2022-12-13 15:41:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:22,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:22,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:22,295 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 [2022-12-13 15:41:22,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:22,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-13 15:41:22,306 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 [2022-12-13 15:41:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:22,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107726276] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:22,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:22,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 43 [2022-12-13 15:41:22,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466653790] [2022-12-13 15:41:22,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:22,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 15:41:22,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:22,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 15:41:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1670, Unknown=2, NotChecked=0, Total=1806 [2022-12-13 15:41:22,545 INFO L87 Difference]: Start difference. First operand 163 states and 184 transitions. Second operand has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 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) [2022-12-13 15:41:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:23,967 INFO L93 Difference]: Finished difference Result 296 states and 321 transitions. [2022-12-13 15:41:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 15:41:23,967 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 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) Word has length 33 [2022-12-13 15:41:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:23,968 INFO L225 Difference]: With dead ends: 296 [2022-12-13 15:41:23,968 INFO L226 Difference]: Without dead ends: 233 [2022-12-13 15:41:23,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=697, Invalid=4131, Unknown=2, NotChecked=0, Total=4830 [2022-12-13 15:41:23,969 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 337 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:23,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 865 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:41:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-12-13 15:41:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 204. [2022-12-13 15:41:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.1386138613861385) internal successors, (230), 203 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 230 transitions. [2022-12-13 15:41:23,972 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 230 transitions. Word has length 33 [2022-12-13 15:41:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:23,972 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 230 transitions. [2022-12-13 15:41:23,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 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) [2022-12-13 15:41:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 230 transitions. [2022-12-13 15:41:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 15:41:23,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:23,972 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:23,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:41:24,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 15:41:24,174 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1700374044, now seen corresponding path program 3 times [2022-12-13 15:41:24,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:24,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479051189] [2022-12-13 15:41:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:24,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479051189] [2022-12-13 15:41:24,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479051189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:24,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624753653] [2022-12-13 15:41:24,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:41:24,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:24,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:24,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:24,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:41:24,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 15:41:24,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:24,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 15:41:24,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:24,451 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:41:24,452 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 [2022-12-13 15:41:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:24,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:24,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624753653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:24,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:24,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-12-13 15:41:24,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135621963] [2022-12-13 15:41:24,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:24,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:41:24,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:41:24,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:41:24,784 INFO L87 Difference]: Start difference. First operand 204 states and 230 transitions. Second operand has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 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) [2022-12-13 15:41:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:25,033 INFO L93 Difference]: Finished difference Result 272 states and 300 transitions. [2022-12-13 15:41:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:41:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 15:41:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:25,035 INFO L225 Difference]: With dead ends: 272 [2022-12-13 15:41:25,035 INFO L226 Difference]: Without dead ends: 272 [2022-12-13 15:41:25,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 15:41:25,037 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 215 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:25,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 360 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:41:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-13 15:41:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 245. [2022-12-13 15:41:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.1358024691358024) internal successors, (276), 244 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 276 transitions. [2022-12-13 15:41:25,041 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 276 transitions. Word has length 37 [2022-12-13 15:41:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:25,041 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 276 transitions. [2022-12-13 15:41:25,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.782608695652174) internal successors, (87), 24 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) [2022-12-13 15:41:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 276 transitions. [2022-12-13 15:41:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 15:41:25,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:25,041 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:25,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 15:41:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 15:41:25,244 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:25,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:25,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1745665110, now seen corresponding path program 3 times [2022-12-13 15:41:25,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:25,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717629550] [2022-12-13 15:41:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:25,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:25,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717629550] [2022-12-13 15:41:25,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717629550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:25,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843346060] [2022-12-13 15:41:25,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:41:25,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:25,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:25,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:25,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:41:25,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 15:41:25,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 15:41:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:25,668 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 [2022-12-13 15:41:26,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:41:26,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-12-13 15:41:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:26,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:26,708 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 [2022-12-13 15:41:26,712 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 [2022-12-13 15:41:26,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-12-13 15:41:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:26,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843346060] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:26,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:26,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-12-13 15:41:26,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595560427] [2022-12-13 15:41:26,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:26,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 15:41:26,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 15:41:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 15:41:26,746 INFO L87 Difference]: Start difference. First operand 245 states and 276 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 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) [2022-12-13 15:41:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:37,186 INFO L93 Difference]: Finished difference Result 471 states and 513 transitions. [2022-12-13 15:41:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 15:41:37,187 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 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 39 [2022-12-13 15:41:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:37,188 INFO L225 Difference]: With dead ends: 471 [2022-12-13 15:41:37,188 INFO L226 Difference]: Without dead ends: 420 [2022-12-13 15:41:37,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1226, Invalid=6255, Unknown=1, NotChecked=0, Total=7482 [2022-12-13 15:41:37,190 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 846 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:37,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 977 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:41:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-12-13 15:41:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 341. [2022-12-13 15:41:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 339 states have (on average 1.1327433628318584) internal successors, (384), 340 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 384 transitions. [2022-12-13 15:41:37,197 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 384 transitions. Word has length 39 [2022-12-13 15:41:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:37,197 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 384 transitions. [2022-12-13 15:41:37,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 40 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) [2022-12-13 15:41:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 384 transitions. [2022-12-13 15:41:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 15:41:37,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:37,199 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:37,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:41:37,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 15:41:37,400 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:37,401 INFO L85 PathProgramCache]: Analyzing trace with hash -609642832, now seen corresponding path program 4 times [2022-12-13 15:41:37,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:37,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871829719] [2022-12-13 15:41:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:37,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:37,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871829719] [2022-12-13 15:41:37,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871829719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138895860] [2022-12-13 15:41:37,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:41:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:37,772 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:37,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:41:37,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:41:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 15:41:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:37,854 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 [2022-12-13 15:41:37,900 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-13 15:41:37,900 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 [2022-12-13 15:41:38,869 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-12-13 15:41:38,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2022-12-13 15:41:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:41:39,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:41:42,404 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 152 treesize of output 136 [2022-12-13 15:41:42,412 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 35 treesize of output 27 [2022-12-13 15:41:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:41:42,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138895860] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:41:42,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:41:42,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 21] total 54 [2022-12-13 15:41:42,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921848291] [2022-12-13 15:41:42,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:41:42,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 15:41:42,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:41:42,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 15:41:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2620, Unknown=1, NotChecked=0, Total=2862 [2022-12-13 15:41:42,452 INFO L87 Difference]: Start difference. First operand 341 states and 384 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 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) [2022-12-13 15:41:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:41:54,550 INFO L93 Difference]: Finished difference Result 611 states and 664 transitions. [2022-12-13 15:41:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 15:41:54,550 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 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) Word has length 45 [2022-12-13 15:41:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:41:54,552 INFO L225 Difference]: With dead ends: 611 [2022-12-13 15:41:54,552 INFO L226 Difference]: Without dead ends: 329 [2022-12-13 15:41:54,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2692 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1677, Invalid=12126, Unknown=3, NotChecked=0, Total=13806 [2022-12-13 15:41:54,555 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 392 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:41:54,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1287 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 15:41:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-12-13 15:41:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 198. [2022-12-13 15:41:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.1269035532994924) internal successors, (222), 197 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:41:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 222 transitions. [2022-12-13 15:41:54,559 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 222 transitions. Word has length 45 [2022-12-13 15:41:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:41:54,559 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 222 transitions. [2022-12-13 15:41:54,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 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) [2022-12-13 15:41:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 222 transitions. [2022-12-13 15:41:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 15:41:54,560 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:41:54,560 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:41:54,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 15:41:54,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:41:54,761 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:41:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:41:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash -424649921, now seen corresponding path program 4 times [2022-12-13 15:41:54,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:41:54,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755129097] [2022-12-13 15:41:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:41:54,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:41:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:41:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:41:55,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:41:55,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755129097] [2022-12-13 15:41:55,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755129097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:41:55,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010910451] [2022-12-13 15:41:55,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:41:55,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:41:55,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:41:55,105 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:41:55,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:41:55,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:41:55,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:41:55,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 15:41:55,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:41:55,284 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 [2022-12-13 15:42:00,936 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-12-13 15:42:00,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2022-12-13 15:42:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 19 proven. 27 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:00,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:01,680 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 59 treesize of output 51 [2022-12-13 15:42:01,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:42:01,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 45 [2022-12-13 15:42:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:01,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010910451] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:01,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:01,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 26] total 59 [2022-12-13 15:42:01,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660457797] [2022-12-13 15:42:01,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:01,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 15:42:01,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 15:42:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3109, Unknown=7, NotChecked=0, Total=3422 [2022-12-13 15:42:01,913 INFO L87 Difference]: Start difference. First operand 198 states and 222 transitions. Second operand has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 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) [2022-12-13 15:42:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:42:04,758 INFO L93 Difference]: Finished difference Result 389 states and 425 transitions. [2022-12-13 15:42:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 15:42:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 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) Word has length 48 [2022-12-13 15:42:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:42:04,759 INFO L225 Difference]: With dead ends: 389 [2022-12-13 15:42:04,759 INFO L226 Difference]: Without dead ends: 238 [2022-12-13 15:42:04,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1420, Invalid=7503, Unknown=7, NotChecked=0, Total=8930 [2022-12-13 15:42:04,761 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 346 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:42:04,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 422 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:42:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-12-13 15:42:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 214. [2022-12-13 15:42:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.1173708920187793) internal successors, (238), 213 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 238 transitions. [2022-12-13 15:42:04,764 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 238 transitions. Word has length 48 [2022-12-13 15:42:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:42:04,765 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 238 transitions. [2022-12-13 15:42:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 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) [2022-12-13 15:42:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 238 transitions. [2022-12-13 15:42:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 15:42:04,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:42:04,766 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:04,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:42:04,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:04,966 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:42:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1878539292, now seen corresponding path program 5 times [2022-12-13 15:42:04,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:04,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424739393] [2022-12-13 15:42:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:04,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:05,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424739393] [2022-12-13 15:42:05,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424739393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791011621] [2022-12-13 15:42:05,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:42:05,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:05,309 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:05,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:42:05,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 15:42:05,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:05,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 15:42:05,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:05,402 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:42:05,402 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 [2022-12-13 15:42:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:05,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:06,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791011621] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:06,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:06,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2022-12-13 15:42:06,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034733088] [2022-12-13 15:42:06,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:06,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 15:42:06,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:06,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 15:42:06,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 15:42:06,097 INFO L87 Difference]: Start difference. First operand 214 states and 238 transitions. Second operand has 40 states, 39 states have (on average 3.282051282051282) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:42:06,689 INFO L93 Difference]: Finished difference Result 278 states and 305 transitions. [2022-12-13 15:42:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:42:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.282051282051282) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 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 [2022-12-13 15:42:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:42:06,690 INFO L225 Difference]: With dead ends: 278 [2022-12-13 15:42:06,690 INFO L226 Difference]: Without dead ends: 278 [2022-12-13 15:42:06,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=635, Invalid=2227, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 15:42:06,691 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 432 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:42:06,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 491 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:42:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-12-13 15:42:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 234. [2022-12-13 15:42:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1201716738197425) internal successors, (261), 233 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 261 transitions. [2022-12-13 15:42:06,695 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 261 transitions. Word has length 52 [2022-12-13 15:42:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:42:06,695 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 261 transitions. [2022-12-13 15:42:06,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.282051282051282) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 261 transitions. [2022-12-13 15:42:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 15:42:06,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:42:06,696 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:06,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:42:06,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:06,897 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:42:06,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:06,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1586425820, now seen corresponding path program 6 times [2022-12-13 15:42:06,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:06,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130075914] [2022-12-13 15:42:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:06,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:07,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130075914] [2022-12-13 15:42:07,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130075914] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098642279] [2022-12-13 15:42:07,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:42:07,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:07,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:07,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:07,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:42:07,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 15:42:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:07,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 15:42:07,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:07,537 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 [2022-12-13 15:42:07,703 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 [2022-12-13 15:42:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:07,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:07,793 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 [2022-12-13 15:42:07,796 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 [2022-12-13 15:42:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:07,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098642279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:07,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:07,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2022-12-13 15:42:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469758877] [2022-12-13 15:42:07,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:07,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 15:42:07,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:07,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 15:42:07,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 15:42:07,906 INFO L87 Difference]: Start difference. First operand 234 states and 261 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 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) [2022-12-13 15:42:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:42:08,736 INFO L93 Difference]: Finished difference Result 454 states and 496 transitions. [2022-12-13 15:42:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:42:08,736 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 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 57 [2022-12-13 15:42:08,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:42:08,738 INFO L225 Difference]: With dead ends: 454 [2022-12-13 15:42:08,738 INFO L226 Difference]: Without dead ends: 274 [2022-12-13 15:42:08,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=559, Invalid=3101, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 15:42:08,739 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 264 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:42:08,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 806 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:42:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-12-13 15:42:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 250. [2022-12-13 15:42:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.1124497991967872) internal successors, (277), 249 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 277 transitions. [2022-12-13 15:42:08,742 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 277 transitions. Word has length 57 [2022-12-13 15:42:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:42:08,742 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 277 transitions. [2022-12-13 15:42:08,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 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) [2022-12-13 15:42:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 277 transitions. [2022-12-13 15:42:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-13 15:42:08,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:42:08,743 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:08,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:42:08,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 15:42:08,945 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:42:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2072623007, now seen corresponding path program 7 times [2022-12-13 15:42:08,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:08,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953635411] [2022-12-13 15:42:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:08,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:09,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:09,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953635411] [2022-12-13 15:42:09,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953635411] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:09,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962963475] [2022-12-13 15:42:09,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:42:09,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:09,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:09,372 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:42:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:09,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 15:42:09,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:09,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:10,044 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 [2022-12-13 15:42:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:10,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962963475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:10,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:10,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2022-12-13 15:42:10,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269351925] [2022-12-13 15:42:10,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:10,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 15:42:10,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 15:42:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 15:42:10,123 INFO L87 Difference]: Start difference. First operand 250 states and 277 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:42:10,860 INFO L93 Difference]: Finished difference Result 323 states and 353 transitions. [2022-12-13 15:42:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 15:42:10,861 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-13 15:42:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:42:10,861 INFO L225 Difference]: With dead ends: 323 [2022-12-13 15:42:10,862 INFO L226 Difference]: Without dead ends: 323 [2022-12-13 15:42:10,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 15:42:10,862 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 461 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:42:10,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 577 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:42:10,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-12-13 15:42:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 270. [2022-12-13 15:42:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1152416356877324) internal successors, (300), 269 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 300 transitions. [2022-12-13 15:42:10,866 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 300 transitions. Word has length 61 [2022-12-13 15:42:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:42:10,866 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 300 transitions. [2022-12-13 15:42:10,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 300 transitions. [2022-12-13 15:42:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 15:42:10,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:42:10,867 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:10,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 15:42:11,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 15:42:11,068 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:42:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:11,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1455608263, now seen corresponding path program 8 times [2022-12-13 15:42:11,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:11,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026419323] [2022-12-13 15:42:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:11,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:11,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026419323] [2022-12-13 15:42:11,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026419323] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:11,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402175343] [2022-12-13 15:42:11,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:42:11,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:11,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:11,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:11,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:42:11,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:42:11,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 15:42:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:11,897 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 [2022-12-13 15:42:12,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:42:12,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:42:12,535 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 [2022-12-13 15:42:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:12,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:12,741 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 [2022-12-13 15:42:12,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 15:42:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:13,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402175343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:13,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:13,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-12-13 15:42:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805348517] [2022-12-13 15:42:13,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:13,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 15:42:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 15:42:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2666, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 15:42:13,105 INFO L87 Difference]: Start difference. First operand 270 states and 300 transitions. Second operand has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:42:14,612 INFO L93 Difference]: Finished difference Result 519 states and 567 transitions. [2022-12-13 15:42:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 15:42:14,612 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-13 15:42:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:42:14,614 INFO L225 Difference]: With dead ends: 519 [2022-12-13 15:42:14,614 INFO L226 Difference]: Without dead ends: 310 [2022-12-13 15:42:14,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=770, Invalid=5872, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 15:42:14,615 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 443 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:42:14,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 1090 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:42:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-12-13 15:42:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2022-12-13 15:42:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.1087719298245613) internal successors, (316), 285 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 316 transitions. [2022-12-13 15:42:14,621 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 316 transitions. Word has length 66 [2022-12-13 15:42:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:42:14,621 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 316 transitions. [2022-12-13 15:42:14,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.8333333333333335) internal successors, (153), 54 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 316 transitions. [2022-12-13 15:42:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 15:42:14,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:42:14,622 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:14,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 15:42:14,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 15:42:14,824 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:42:14,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1335660074, now seen corresponding path program 9 times [2022-12-13 15:42:14,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:14,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16280463] [2022-12-13 15:42:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:14,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:15,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:15,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16280463] [2022-12-13 15:42:15,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16280463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542650645] [2022-12-13 15:42:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:42:15,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:15,248 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:15,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:42:15,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 15:42:15,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:15,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 15:42:15,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:42:16,080 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 5 [2022-12-13 15:42:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:16,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542650645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:42:16,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:42:16,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2022-12-13 15:42:16,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705601220] [2022-12-13 15:42:16,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:42:16,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 15:42:16,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:42:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 15:42:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2157, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 15:42:16,191 INFO L87 Difference]: Start difference. First operand 286 states and 316 transitions. Second operand has 50 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:42:16,982 INFO L93 Difference]: Finished difference Result 368 states and 401 transitions. [2022-12-13 15:42:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 15:42:16,982 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-12-13 15:42:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:42:16,983 INFO L225 Difference]: With dead ends: 368 [2022-12-13 15:42:16,983 INFO L226 Difference]: Without dead ends: 368 [2022-12-13 15:42:16,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 103 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=886, Invalid=3670, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 15:42:16,984 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 464 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:42:16,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 629 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:42:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-12-13 15:42:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 306. [2022-12-13 15:42:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1114754098360655) internal successors, (339), 305 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) [2022-12-13 15:42:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 339 transitions. [2022-12-13 15:42:16,988 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 339 transitions. Word has length 70 [2022-12-13 15:42:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:42:16,988 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 339 transitions. [2022-12-13 15:42:16,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:42:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 339 transitions. [2022-12-13 15:42:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 15:42:16,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:42:16,989 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:42:16,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 15:42:17,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 15:42:17,190 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:42:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:42:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1463959138, now seen corresponding path program 10 times [2022-12-13 15:42:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:42:17,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388455781] [2022-12-13 15:42:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:42:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:42:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:42:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 14 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:17,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:42:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388455781] [2022-12-13 15:42:17,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388455781] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:42:17,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373306384] [2022-12-13 15:42:17,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:42:17,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:42:17,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:42:17,668 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:42:17,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 15:42:17,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:42:17,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:42:17,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-13 15:42:17,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:42:17,930 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 [2022-12-13 15:42:54,526 INFO L321 Elim1Store]: treesize reduction 29, result has 49.1 percent of original size [2022-12-13 15:42:54,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 58 [2022-12-13 15:42:54,529 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 15:42:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 60 proven. 90 refuted. 35 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:42:54,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:43:01,538 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 104 treesize of output 90 [2022-12-13 15:43:01,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:43:01,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 78 [2022-12-13 15:43:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 119 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:43:02,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373306384] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:43:02,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:43:02,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 41, 41] total 95 [2022-12-13 15:43:02,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110580438] [2022-12-13 15:43:02,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:43:02,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-12-13 15:43:02,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:43:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-12-13 15:43:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=8148, Unknown=52, NotChecked=0, Total=8930 [2022-12-13 15:43:02,117 INFO L87 Difference]: Start difference. First operand 306 states and 339 transitions. Second operand has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 95 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:44:16,032 INFO L93 Difference]: Finished difference Result 584 states and 638 transitions. [2022-12-13 15:44:16,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-13 15:44:16,032 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 95 states have internal predecessors, (203), 0 states have call successors, (0), 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 75 [2022-12-13 15:44:16,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:44:16,033 INFO L225 Difference]: With dead ends: 584 [2022-12-13 15:44:16,033 INFO L226 Difference]: Without dead ends: 346 [2022-12-13 15:44:16,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5603 ImplicationChecksByTransitivity, 110.6s TimeCoverageRelationStatistics Valid=3105, Invalid=19787, Unknown=60, NotChecked=0, Total=22952 [2022-12-13 15:44:16,035 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 671 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 29 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-12-13 15:44:16,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 943 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2545 Invalid, 6 Unknown, 0 Unchecked, 6.9s Time] [2022-12-13 15:44:16,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-12-13 15:44:16,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 322. [2022-12-13 15:44:16,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.1059190031152648) internal successors, (355), 321 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:16,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 355 transitions. [2022-12-13 15:44:16,041 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 355 transitions. Word has length 75 [2022-12-13 15:44:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:44:16,041 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 355 transitions. [2022-12-13 15:44:16,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.136842105263158) internal successors, (203), 95 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:16,042 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 355 transitions. [2022-12-13 15:44:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 15:44:16,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:44:16,043 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:16,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 15:44:16,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:16,243 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:44:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash 75610981, now seen corresponding path program 11 times [2022-12-13 15:44:16,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:16,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991328761] [2022-12-13 15:44:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:16,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:16,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991328761] [2022-12-13 15:44:16,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991328761] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:16,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229341745] [2022-12-13 15:44:16,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:44:16,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:16,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:16,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:16,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 15:44:16,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 15:44:16,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:44:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 87 conjunts are in the unsatisfiable core [2022-12-13 15:44:16,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:16,772 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:44:16,772 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 [2022-12-13 15:44:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:17,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:17,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229341745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:17,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:17,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2022-12-13 15:44:17,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794113125] [2022-12-13 15:44:17,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:17,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 15:44:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 15:44:17,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2585, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 15:44:17,687 INFO L87 Difference]: Start difference. First operand 322 states and 355 transitions. Second operand has 55 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 55 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:44:18,452 INFO L93 Difference]: Finished difference Result 413 states and 449 transitions. [2022-12-13 15:44:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 15:44:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 55 states have internal predecessors, (194), 0 states have call successors, (0), 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 79 [2022-12-13 15:44:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:44:18,453 INFO L225 Difference]: With dead ends: 413 [2022-12-13 15:44:18,453 INFO L226 Difference]: Without dead ends: 413 [2022-12-13 15:44:18,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1216, Invalid=4334, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 15:44:18,454 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 640 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:44:18,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 874 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:44:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-12-13 15:44:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 342. [2022-12-13 15:44:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.1085043988269794) internal successors, (378), 341 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 378 transitions. [2022-12-13 15:44:18,458 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 378 transitions. Word has length 79 [2022-12-13 15:44:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:44:18,458 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 378 transitions. [2022-12-13 15:44:18,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 55 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 378 transitions. [2022-12-13 15:44:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 15:44:18,459 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:44:18,459 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:18,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 15:44:18,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:18,661 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:44:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:18,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1806603827, now seen corresponding path program 12 times [2022-12-13 15:44:18,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:18,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250636557] [2022-12-13 15:44:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:18,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250636557] [2022-12-13 15:44:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250636557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:19,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742499953] [2022-12-13 15:44:19,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:44:19,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:19,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:19,212 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:19,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 15:44:19,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-12-13 15:44:19,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:44:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-13 15:44:19,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:19,622 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 [2022-12-13 15:44:19,803 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 [2022-12-13 15:44:19,859 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 [2022-12-13 15:44:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:19,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:19,901 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 [2022-12-13 15:44:19,984 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 [2022-12-13 15:44:19,985 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 [2022-12-13 15:44:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:20,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742499953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:20,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:20,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 25] total 46 [2022-12-13 15:44:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751592608] [2022-12-13 15:44:20,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:20,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 15:44:20,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:20,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 15:44:20,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 15:44:20,111 INFO L87 Difference]: Start difference. First operand 342 states and 378 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:44:21,508 INFO L93 Difference]: Finished difference Result 649 states and 709 transitions. [2022-12-13 15:44:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 15:44:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 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 84 [2022-12-13 15:44:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:44:21,509 INFO L225 Difference]: With dead ends: 649 [2022-12-13 15:44:21,510 INFO L226 Difference]: Without dead ends: 382 [2022-12-13 15:44:21,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=741, Invalid=5579, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 15:44:21,510 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 448 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:44:21,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1479 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:44:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-12-13 15:44:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 358. [2022-12-13 15:44:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.1036414565826331) internal successors, (394), 357 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 394 transitions. [2022-12-13 15:44:21,514 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 394 transitions. Word has length 84 [2022-12-13 15:44:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:44:21,514 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 394 transitions. [2022-12-13 15:44:21,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 46 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 394 transitions. [2022-12-13 15:44:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-13 15:44:21,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:44:21,516 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:21,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 15:44:21,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 15:44:21,717 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:44:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash -295170928, now seen corresponding path program 13 times [2022-12-13 15:44:21,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:21,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663102739] [2022-12-13 15:44:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:22,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663102739] [2022-12-13 15:44:22,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663102739] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815960625] [2022-12-13 15:44:22,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:44:22,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:22,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:22,334 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:22,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 15:44:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:22,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-13 15:44:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:22,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:23,164 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 [2022-12-13 15:44:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:23,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815960625] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:23,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:23,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2022-12-13 15:44:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609830839] [2022-12-13 15:44:23,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:23,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 15:44:23,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 15:44:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 15:44:23,313 INFO L87 Difference]: Start difference. First operand 358 states and 394 transitions. Second operand has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:44:24,481 INFO L93 Difference]: Finished difference Result 458 states and 497 transitions. [2022-12-13 15:44:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:44:24,481 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 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 88 [2022-12-13 15:44:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:44:24,484 INFO L225 Difference]: With dead ends: 458 [2022-12-13 15:44:24,484 INFO L226 Difference]: Without dead ends: 458 [2022-12-13 15:44:24,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1017, Invalid=4239, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 15:44:24,485 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 663 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:44:24,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 934 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:44:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-12-13 15:44:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 378. [2022-12-13 15:44:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.106100795755968) internal successors, (417), 377 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 417 transitions. [2022-12-13 15:44:24,492 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 417 transitions. Word has length 88 [2022-12-13 15:44:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:44:24,492 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 417 transitions. [2022-12-13 15:44:24,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 417 transitions. [2022-12-13 15:44:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-13 15:44:24,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:44:24,493 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:24,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 15:44:24,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 15:44:24,693 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:44:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1131628520, now seen corresponding path program 14 times [2022-12-13 15:44:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:24,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458973076] [2022-12-13 15:44:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:24,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:25,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:25,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458973076] [2022-12-13 15:44:25,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458973076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:25,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354290531] [2022-12-13 15:44:25,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:44:25,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:25,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:25,360 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:25,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 15:44:25,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:44:25,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:44:25,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-13 15:44:25,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:25,645 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 [2022-12-13 15:44:25,849 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 [2022-12-13 15:44:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:25,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:25,968 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 [2022-12-13 15:44:25,969 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 [2022-12-13 15:44:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354290531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:26,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:26,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 48 [2022-12-13 15:44:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798474761] [2022-12-13 15:44:26,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 15:44:26,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 15:44:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 15:44:26,086 INFO L87 Difference]: Start difference. First operand 378 states and 417 transitions. Second operand has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:44:28,266 INFO L93 Difference]: Finished difference Result 714 states and 780 transitions. [2022-12-13 15:44:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 15:44:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 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 93 [2022-12-13 15:44:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:44:28,267 INFO L225 Difference]: With dead ends: 714 [2022-12-13 15:44:28,267 INFO L226 Difference]: Without dead ends: 418 [2022-12-13 15:44:28,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=795, Invalid=6345, Unknown=0, NotChecked=0, Total=7140 [2022-12-13 15:44:28,268 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 498 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:44:28,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1800 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:44:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-12-13 15:44:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 394. [2022-12-13 15:44:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.1017811704834606) internal successors, (433), 393 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 433 transitions. [2022-12-13 15:44:28,274 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 433 transitions. Word has length 93 [2022-12-13 15:44:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:44:28,274 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 433 transitions. [2022-12-13 15:44:28,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 433 transitions. [2022-12-13 15:44:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-13 15:44:28,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:44:28,275 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:28,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 15:44:28,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 15:44:28,476 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:44:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:28,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1504487979, now seen corresponding path program 15 times [2022-12-13 15:44:28,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:28,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212464255] [2022-12-13 15:44:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:28,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:29,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212464255] [2022-12-13 15:44:29,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212464255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517022450] [2022-12-13 15:44:29,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:44:29,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:29,119 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:29,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 15:44:29,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-13 15:44:29,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:44:29,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-13 15:44:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:29,288 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:44:29,288 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 [2022-12-13 15:44:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:29,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:44:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 120 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:30,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517022450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:44:30,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:44:30,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 74 [2022-12-13 15:44:30,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845207573] [2022-12-13 15:44:30,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:44:30,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-13 15:44:30,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:44:30,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-13 15:44:30,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=4885, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 15:44:30,639 INFO L87 Difference]: Start difference. First operand 394 states and 433 transitions. Second operand has 75 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 75 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:44:31,828 INFO L93 Difference]: Finished difference Result 503 states and 545 transitions. [2022-12-13 15:44:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 15:44:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 75 states have internal predecessors, (281), 0 states have call successors, (0), 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 97 [2022-12-13 15:44:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:44:31,830 INFO L225 Difference]: With dead ends: 503 [2022-12-13 15:44:31,830 INFO L226 Difference]: Without dead ends: 503 [2022-12-13 15:44:31,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1921, Invalid=7781, Unknown=0, NotChecked=0, Total=9702 [2022-12-13 15:44:31,831 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 910 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:44:31,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1139 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:44:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-12-13 15:44:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 414. [2022-12-13 15:44:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1041162227602905) internal successors, (456), 413 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 456 transitions. [2022-12-13 15:44:31,836 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 456 transitions. Word has length 97 [2022-12-13 15:44:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:44:31,836 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 456 transitions. [2022-12-13 15:44:31,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 75 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:44:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 456 transitions. [2022-12-13 15:44:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-13 15:44:31,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:44:31,837 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:44:31,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 15:44:32,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 15:44:32,038 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:44:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:44:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash 872936237, now seen corresponding path program 16 times [2022-12-13 15:44:32,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:44:32,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701609491] [2022-12-13 15:44:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:44:32,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:44:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:44:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:44:32,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:44:32,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701609491] [2022-12-13 15:44:32,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701609491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:44:32,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510465682] [2022-12-13 15:44:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:44:32,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:44:32,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:44:32,816 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:44:32,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 15:44:32,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:44:32,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:44:32,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 154 conjunts are in the unsatisfiable core [2022-12-13 15:44:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:44:33,288 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 [2022-12-13 15:46:24,897 INFO L321 Elim1Store]: treesize reduction 41, result has 49.4 percent of original size [2022-12-13 15:46:24,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 108 treesize of output 82 [2022-12-13 15:46:24,900 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-12-13 15:46:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 68 proven. 189 refuted. 141 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:46:24,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:37,845 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 149 treesize of output 129 [2022-12-13 15:46:37,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:46:37,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 149 treesize of output 111 [2022-12-13 15:46:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 245 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:46:39,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510465682] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:39,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:46:39,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 56, 56] total 131 [2022-12-13 15:46:39,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75583174] [2022-12-13 15:46:39,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:39,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-12-13 15:46:39,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:39,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-12-13 15:46:39,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=15568, Unknown=143, NotChecked=0, Total=17030 [2022-12-13 15:46:39,073 INFO L87 Difference]: Start difference. First operand 414 states and 456 transitions. Second operand has 131 states, 131 states have (on average 2.16793893129771) internal successors, (284), 131 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:46:58,579 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 112 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:47:06,796 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 114 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:47:23,701 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 80 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:47:24,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:47:31,599 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 126 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:47:38,673 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 133 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:47:50,532 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 91 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:47:51,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:47:58,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:47:59,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:48:14,879 WARN L233 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 132 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:48:31,452 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 91 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:48:32,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:48:33,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:48:39,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:48:52,098 WARN L233 SmtUtils]: Spent 12.27s on a formula simplification. DAG size of input: 149 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:49:05,243 WARN L233 SmtUtils]: Spent 12.70s on a formula simplification. DAG size of input: 151 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:49:21,685 WARN L233 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 101 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:49:22,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:49:30,443 WARN L233 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 99 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:49:44,105 WARN L233 SmtUtils]: Spent 13.06s on a formula simplification. DAG size of input: 162 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:49:54,383 WARN L233 SmtUtils]: Spent 9.77s on a formula simplification. DAG size of input: 164 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:49:55,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:50:16,231 WARN L233 SmtUtils]: Spent 13.21s on a formula simplification. DAG size of input: 105 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:50:17,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:50:35,660 WARN L233 SmtUtils]: Spent 14.14s on a formula simplification. DAG size of input: 155 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:50:46,208 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 157 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:50:47,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:51:03,226 WARN L233 SmtUtils]: Spent 10.62s on a formula simplification. DAG size of input: 107 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:51:22,868 WARN L233 SmtUtils]: Spent 18.49s on a formula simplification. DAG size of input: 163 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:51:34,942 WARN L233 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 166 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:51:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:40,392 INFO L93 Difference]: Finished difference Result 779 states and 851 transitions. [2022-12-13 15:51:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-13 15:51:40,392 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.16793893129771) internal successors, (284), 131 states have internal predecessors, (284), 0 states have call successors, (0), 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 102 [2022-12-13 15:51:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:40,393 INFO L225 Difference]: With dead ends: 779 [2022-12-13 15:51:40,393 INFO L226 Difference]: Without dead ends: 454 [2022-12-13 15:51:40,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9660 ImplicationChecksByTransitivity, 408.2s TimeCoverageRelationStatistics Valid=5403, Invalid=37921, Unknown=148, NotChecked=0, Total=43472 [2022-12-13 15:51:40,395 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 960 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 4507 mSolverCounterSat, 16 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 4535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4507 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:40,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 1328 Invalid, 4535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4507 Invalid, 12 Unknown, 0 Unchecked, 17.8s Time] [2022-12-13 15:51:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-12-13 15:51:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 430. [2022-12-13 15:51:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.1002331002331003) internal successors, (472), 429 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 472 transitions. [2022-12-13 15:51:40,399 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 472 transitions. Word has length 102 [2022-12-13 15:51:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:40,399 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 472 transitions. [2022-12-13 15:51:40,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.16793893129771) internal successors, (284), 131 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 472 transitions. [2022-12-13 15:51:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 15:51:40,399 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:40,400 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:40,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 15:51:40,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:40,601 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:51:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:40,602 INFO L85 PathProgramCache]: Analyzing trace with hash 443903050, now seen corresponding path program 17 times [2022-12-13 15:51:40,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:40,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139521870] [2022-12-13 15:51:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:40,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 120 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:41,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139521870] [2022-12-13 15:51:41,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139521870] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:41,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149162018] [2022-12-13 15:51:41,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 15:51:41,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:41,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:41,327 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:41,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 15:51:41,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-13 15:51:41,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:51:41,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-13 15:51:41,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:41,492 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:51:41,492 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 [2022-12-13 15:51:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:41,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:51:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 153 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:42,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149162018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:51:42,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:51:42,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 69 [2022-12-13 15:51:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363098845] [2022-12-13 15:51:42,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:51:42,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-13 15:51:42,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:42,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-13 15:51:42,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=4206, Unknown=0, NotChecked=0, Total=4830 [2022-12-13 15:51:42,889 INFO L87 Difference]: Start difference. First operand 430 states and 472 transitions. Second operand has 70 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 70 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:44,109 INFO L93 Difference]: Finished difference Result 548 states and 593 transitions. [2022-12-13 15:51:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 15:51:44,110 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 70 states have internal predecessors, (260), 0 states have call successors, (0), 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 106 [2022-12-13 15:51:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:44,111 INFO L225 Difference]: With dead ends: 548 [2022-12-13 15:51:44,111 INFO L226 Difference]: Without dead ends: 548 [2022-12-13 15:51:44,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1983, Invalid=7137, Unknown=0, NotChecked=0, Total=9120 [2022-12-13 15:51:44,112 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 704 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:44,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 1307 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:51:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-12-13 15:51:44,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 450. [2022-12-13 15:51:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.1024498886414253) internal successors, (495), 449 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 495 transitions. [2022-12-13 15:51:44,116 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 495 transitions. Word has length 106 [2022-12-13 15:51:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:44,117 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 495 transitions. [2022-12-13 15:51:44,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 70 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 495 transitions. [2022-12-13 15:51:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 15:51:44,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:44,117 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:44,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 15:51:44,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:44,319 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:51:44,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash -246502290, now seen corresponding path program 18 times [2022-12-13 15:51:44,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:44,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475255532] [2022-12-13 15:51:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:44,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:45,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475255532] [2022-12-13 15:51:45,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475255532] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:45,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913770287] [2022-12-13 15:51:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 15:51:45,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:45,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:45,152 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:45,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 15:51:45,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-13 15:51:45,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:51:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 130 conjunts are in the unsatisfiable core [2022-12-13 15:51:45,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:45,736 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 [2022-12-13 15:51:46,000 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 [2022-12-13 15:51:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:46,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:51:46,150 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 [2022-12-13 15:51:46,152 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 [2022-12-13 15:51:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 22 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:46,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913770287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:51:46,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:51:46,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 54 [2022-12-13 15:51:46,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464661745] [2022-12-13 15:51:46,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:51:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 15:51:46,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 15:51:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2703, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 15:51:46,301 INFO L87 Difference]: Start difference. First operand 450 states and 495 transitions. Second operand has 54 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 54 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:48,439 INFO L93 Difference]: Finished difference Result 844 states and 922 transitions. [2022-12-13 15:51:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-13 15:51:48,439 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 54 states have internal predecessors, (174), 0 states have call successors, (0), 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 111 [2022-12-13 15:51:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:48,440 INFO L225 Difference]: With dead ends: 844 [2022-12-13 15:51:48,440 INFO L226 Difference]: Without dead ends: 490 [2022-12-13 15:51:48,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=913, Invalid=8399, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 15:51:48,441 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 602 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 2768 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 2317 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:48,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 2317 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2768 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:51:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-12-13 15:51:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 466. [2022-12-13 15:51:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.0989247311827957) internal successors, (511), 465 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 511 transitions. [2022-12-13 15:51:48,445 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 511 transitions. Word has length 111 [2022-12-13 15:51:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:48,445 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 511 transitions. [2022-12-13 15:51:48,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.2222222222222223) internal successors, (174), 54 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:48,445 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 511 transitions. [2022-12-13 15:51:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-13 15:51:48,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:48,446 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:48,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 15:51:48,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:48,647 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:51:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1481319409, now seen corresponding path program 19 times [2022-12-13 15:51:48,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:48,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384473340] [2022-12-13 15:51:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:48,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 153 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:49,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:49,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384473340] [2022-12-13 15:51:49,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384473340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:49,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715716119] [2022-12-13 15:51:49,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 15:51:49,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:49,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:49,421 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:49,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 15:51:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:49,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 117 conjunts are in the unsatisfiable core [2022-12-13 15:51:49,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:49,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:51:50,627 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 5 treesize of output 3 [2022-12-13 15:51:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 190 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:50,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715716119] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:51:50,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:51:50,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 62 [2022-12-13 15:51:50,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616456971] [2022-12-13 15:51:50,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:51:50,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 15:51:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 15:51:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=3499, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 15:51:50,886 INFO L87 Difference]: Start difference. First operand 466 states and 511 transitions. Second operand has 63 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 63 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:52,601 INFO L93 Difference]: Finished difference Result 593 states and 641 transitions. [2022-12-13 15:51:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 15:51:52,601 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 63 states have internal predecessors, (233), 0 states have call successors, (0), 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 115 [2022-12-13 15:51:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:52,602 INFO L225 Difference]: With dead ends: 593 [2022-12-13 15:51:52,602 INFO L226 Difference]: Without dead ends: 593 [2022-12-13 15:51:52,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 12 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1582, Invalid=6608, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 15:51:52,603 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 601 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:52,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 1669 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:51:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-12-13 15:51:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 486. [2022-12-13 15:51:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.1010309278350516) internal successors, (534), 485 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 534 transitions. [2022-12-13 15:51:52,608 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 534 transitions. Word has length 115 [2022-12-13 15:51:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:52,608 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 534 transitions. [2022-12-13 15:51:52,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 63 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 534 transitions. [2022-12-13 15:51:52,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-13 15:51:52,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:52,609 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:52,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 15:51:52,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:52,810 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:51:52,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:52,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1953277223, now seen corresponding path program 20 times [2022-12-13 15:51:52,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:52,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211298809] [2022-12-13 15:51:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:52,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:53,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211298809] [2022-12-13 15:51:53,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211298809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:53,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846774093] [2022-12-13 15:51:53,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:51:53,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:53,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:53,744 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:53,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 15:51:53,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:51:53,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:51:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 140 conjunts are in the unsatisfiable core [2022-12-13 15:51:53,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:54,231 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 [2022-12-13 15:51:54,455 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 [2022-12-13 15:51:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:54,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:51:54,634 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 [2022-12-13 15:51:54,636 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 [2022-12-13 15:51:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 24 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:54,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846774093] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:51:54,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:51:54,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 57 [2022-12-13 15:51:54,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966574178] [2022-12-13 15:51:54,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:51:54,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 15:51:54,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:54,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 15:51:54,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 15:51:54,832 INFO L87 Difference]: Start difference. First operand 486 states and 534 transitions. Second operand has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:51:57,628 INFO L93 Difference]: Finished difference Result 909 states and 993 transitions. [2022-12-13 15:51:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-13 15:51:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 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 120 [2022-12-13 15:51:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:51:57,629 INFO L225 Difference]: With dead ends: 909 [2022-12-13 15:51:57,629 INFO L226 Difference]: Without dead ends: 526 [2022-12-13 15:51:57,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=972, Invalid=9534, Unknown=0, NotChecked=0, Total=10506 [2022-12-13 15:51:57,630 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 479 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 3485 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 2883 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:51:57,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 2883 Invalid, 3499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3485 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 15:51:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-12-13 15:51:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 502. [2022-12-13 15:51:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.0978043912175648) internal successors, (550), 501 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 550 transitions. [2022-12-13 15:51:57,634 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 550 transitions. Word has length 120 [2022-12-13 15:51:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:51:57,634 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 550 transitions. [2022-12-13 15:51:57,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.280701754385965) internal successors, (187), 57 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:51:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 550 transitions. [2022-12-13 15:51:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-13 15:51:57,635 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:51:57,635 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:57,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 15:51:57,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:57,837 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:51:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1310388484, now seen corresponding path program 21 times [2022-12-13 15:51:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:57,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636396346] [2022-12-13 15:51:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 190 proven. 440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:58,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:58,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636396346] [2022-12-13 15:51:58,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636396346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:58,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181607952] [2022-12-13 15:51:58,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:51:58,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:58,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:58,908 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:58,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 15:51:59,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-13 15:51:59,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:51:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-13 15:51:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:51:59,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:52:00,741 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 5 [2022-12-13 15:52:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 231 proven. 399 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:52:00,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181607952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:52:00,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:52:00,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 79 [2022-12-13 15:52:00,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868794298] [2022-12-13 15:52:00,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:52:00,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-12-13 15:52:00,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:52:01,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-12-13 15:52:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=5507, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 15:52:01,000 INFO L87 Difference]: Start difference. First operand 502 states and 550 transitions. Second operand has 80 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 80 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:52:03,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:52:03,016 INFO L93 Difference]: Finished difference Result 638 states and 689 transitions. [2022-12-13 15:52:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 15:52:03,017 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 80 states have internal predecessors, (311), 0 states have call successors, (0), 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 124 [2022-12-13 15:52:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:52:03,018 INFO L225 Difference]: With dead ends: 638 [2022-12-13 15:52:03,018 INFO L226 Difference]: Without dead ends: 638 [2022-12-13 15:52:03,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 187 SyntacticMatches, 13 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3639 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2360, Invalid=9630, Unknown=0, NotChecked=0, Total=11990 [2022-12-13 15:52:03,019 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 769 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:52:03,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 1444 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:52:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-12-13 15:52:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 522. [2022-12-13 15:52:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.0998080614203456) internal successors, (573), 521 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:52:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 573 transitions. [2022-12-13 15:52:03,026 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 573 transitions. Word has length 124 [2022-12-13 15:52:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:52:03,027 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 573 transitions. [2022-12-13 15:52:03,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 80 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:52:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 573 transitions. [2022-12-13 15:52:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-13 15:52:03,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:52:03,027 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:52:03,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 15:52:03,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 15:52:03,229 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 15:52:03,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:52:03,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1176433676, now seen corresponding path program 22 times [2022-12-13 15:52:03,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:52:03,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928910630] [2022-12-13 15:52:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:03,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:52:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 692 backedges. 26 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:52:04,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:52:04,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928910630] [2022-12-13 15:52:04,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928910630] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:52:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972560328] [2022-12-13 15:52:04,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:52:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:52:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:52:04,311 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:52:04,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_246d22d6-c90b-4166-8374-ebd4b64438af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 15:52:04,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:52:04,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:52:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 196 conjunts are in the unsatisfiable core [2022-12-13 15:52:04,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:52:04,957 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