./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:49:16,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:49:16,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:49:17,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:49:17,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:49:17,047 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:49:17,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:49:17,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:49:17,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:49:17,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:49:17,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:49:17,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:49:17,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:49:17,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:49:17,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:49:17,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:49:17,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:49:17,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:49:17,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:49:17,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:49:17,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:49:17,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:49:17,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:49:17,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:49:17,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:49:17,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:49:17,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:49:17,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:49:17,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:49:17,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:49:17,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:49:17,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:49:17,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:49:17,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:49:17,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:49:17,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:49:17,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:49:17,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:49:17,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:49:17,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:49:17,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:49:17,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:49:17,160 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:49:17,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:49:17,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:49:17,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:49:17,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:49:17,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:49:17,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:49:17,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:49:17,165 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:49:17,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:49:17,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:49:17,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:49:17,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:49:17,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:49:17,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:49:17,168 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:49:17,168 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:49:17,168 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:49:17,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:49:17,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:49:17,169 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:49:17,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:49:17,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:49:17,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:49:17,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:49:17,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:17,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:49:17,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:49:17,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:49:17,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:49:17,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2022-11-02 20:49:17,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:49:17,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:49:17,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:49:17,559 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:49:17,560 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:49:17,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2022-11-02 20:49:17,645 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/data/f2e1863a7/c0144b6c0f6b4aa5ba864ec474129b18/FLAG41cdf0284 [2022-11-02 20:49:18,169 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:49:18,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2022-11-02 20:49:18,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/data/f2e1863a7/c0144b6c0f6b4aa5ba864ec474129b18/FLAG41cdf0284 [2022-11-02 20:49:18,451 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/data/f2e1863a7/c0144b6c0f6b4aa5ba864ec474129b18 [2022-11-02 20:49:18,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:49:18,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:49:18,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:18,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:49:18,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:49:18,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:18,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a01b062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18, skipping insertion in model container [2022-11-02 20:49:18,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:18,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:49:18,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:49:18,909 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2022-11-02 20:49:18,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:18,928 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:49:18,967 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2022-11-02 20:49:18,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:18,994 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:49:18,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18 WrapperNode [2022-11-02 20:49:18,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:18,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:18,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:49:18,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:49:19,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,059 INFO L138 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2022-11-02 20:49:19,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:19,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:49:19,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:49:19,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:49:19,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,090 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:49:19,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:49:19,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:49:19,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:49:19,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (1/1) ... [2022-11-02 20:49:19,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:19,137 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:49:19,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:49:19,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:49:19,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:49:19,198 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-02 20:49:19,198 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-02 20:49:19,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:49:19,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:49:19,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:49:19,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:49:19,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:49:19,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:49:19,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:49:19,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:49:19,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:49:19,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:49:19,377 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:49:19,380 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:49:19,847 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:49:19,868 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:49:19,869 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-02 20:49:19,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:19 BoogieIcfgContainer [2022-11-02 20:49:19,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:49:19,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:49:19,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:49:19,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:49:19,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:18" (1/3) ... [2022-11-02 20:49:19,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfd025f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:19, skipping insertion in model container [2022-11-02 20:49:19,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:18" (2/3) ... [2022-11-02 20:49:19,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfd025f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:19, skipping insertion in model container [2022-11-02 20:49:19,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:19" (3/3) ... [2022-11-02 20:49:19,884 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2022-11-02 20:49:19,901 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:49:19,901 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2022-11-02 20:49:19,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:19,958 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@197e0c15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:19,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-02 20:49:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:49:19,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:19,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:19,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951417, now seen corresponding path program 1 times [2022-11-02 20:49:19,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:19,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533476633] [2022-11-02 20:49:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:19,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:20,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533476633] [2022-11-02 20:49:20,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533476633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:20,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:20,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:20,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479866842] [2022-11-02 20:49:20,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:20,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:20,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:20,364 INFO L87 Difference]: Start difference. First operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:20,537 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-11-02 20:49:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:49:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:20,550 INFO L225 Difference]: With dead ends: 97 [2022-11-02 20:49:20,550 INFO L226 Difference]: Without dead ends: 94 [2022-11-02 20:49:20,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:20,593 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:20,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-02 20:49:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-02 20:49:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2022-11-02 20:49:20,654 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 7 [2022-11-02 20:49:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:20,654 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2022-11-02 20:49:20,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2022-11-02 20:49:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:49:20,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:20,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:20,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:49:20,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:20,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951418, now seen corresponding path program 1 times [2022-11-02 20:49:20,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:20,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362558864] [2022-11-02 20:49:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:20,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:20,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362558864] [2022-11-02 20:49:20,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362558864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:20,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:20,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250270385] [2022-11-02 20:49:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:20,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:20,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:20,795 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:20,873 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-11-02 20:49:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:49:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:20,875 INFO L225 Difference]: With dead ends: 92 [2022-11-02 20:49:20,876 INFO L226 Difference]: Without dead ends: 92 [2022-11-02 20:49:20,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:20,877 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:20,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-02 20:49:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-02 20:49:20,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-11-02 20:49:20,887 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 7 [2022-11-02 20:49:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:20,888 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-11-02 20:49:20,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:20,888 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-11-02 20:49:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:49:20,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:20,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:20,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:49:20,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390976, now seen corresponding path program 1 times [2022-11-02 20:49:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:20,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007068614] [2022-11-02 20:49:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:21,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:21,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:21,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007068614] [2022-11-02 20:49:21,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007068614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:21,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:21,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:49:21,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065536852] [2022-11-02 20:49:21,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:21,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:49:21,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:49:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:49:21,165 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:49:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:21,461 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-11-02 20:49:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:49:21,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-02 20:49:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:21,465 INFO L225 Difference]: With dead ends: 96 [2022-11-02 20:49:21,465 INFO L226 Difference]: Without dead ends: 96 [2022-11-02 20:49:21,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:49:21,467 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:21,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 369 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:49:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-02 20:49:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-11-02 20:49:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-11-02 20:49:21,482 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 13 [2022-11-02 20:49:21,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:21,482 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-11-02 20:49:21,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:49:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-11-02 20:49:21,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:49:21,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:21,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:21,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:49:21,484 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390975, now seen corresponding path program 1 times [2022-11-02 20:49:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:21,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828504333] [2022-11-02 20:49:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:21,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:21,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:21,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828504333] [2022-11-02 20:49:21,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828504333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:21,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:21,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:49:21,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233517355] [2022-11-02 20:49:21,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:21,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:49:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:49:21,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:49:21,928 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:49:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:22,197 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2022-11-02 20:49:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:49:22,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-02 20:49:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:22,203 INFO L225 Difference]: With dead ends: 95 [2022-11-02 20:49:22,203 INFO L226 Difference]: Without dead ends: 95 [2022-11-02 20:49:22,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:49:22,209 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 9 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:22,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 385 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:49:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-02 20:49:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2022-11-02 20:49:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-11-02 20:49:22,232 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 13 [2022-11-02 20:49:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:22,233 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-11-02 20:49:22,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:49:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-11-02 20:49:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:49:22,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:22,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:22,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:49:22,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2068593344, now seen corresponding path program 1 times [2022-11-02 20:49:22,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:22,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226790616] [2022-11-02 20:49:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:22,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:22,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:49:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:22,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:22,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226790616] [2022-11-02 20:49:22,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226790616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:22,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:22,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:22,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953355958] [2022-11-02 20:49:22,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:22,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:22,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:22,373 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:49:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:22,489 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2022-11-02 20:49:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:49:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-02 20:49:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:22,491 INFO L225 Difference]: With dead ends: 96 [2022-11-02 20:49:22,491 INFO L226 Difference]: Without dead ends: 96 [2022-11-02 20:49:22,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:22,493 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:22,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-02 20:49:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-11-02 20:49:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-11-02 20:49:22,502 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 15 [2022-11-02 20:49:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:22,502 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-11-02 20:49:22,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:49:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-11-02 20:49:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:49:22,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:22,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:22,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:49:22,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1769802942, now seen corresponding path program 1 times [2022-11-02 20:49:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:22,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200546952] [2022-11-02 20:49:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:22,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:22,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:49:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:49:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:22,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200546952] [2022-11-02 20:49:22,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200546952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:22,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436843784] [2022-11-02 20:49:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:22,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:22,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:22,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:49:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:22,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:22,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:49:23,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436843784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:23,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:23,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-11-02 20:49:23,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265742229] [2022-11-02 20:49:23,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:23,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:49:23,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:49:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:49:23,039 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:49:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:23,140 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-11-02 20:49:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:23,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-11-02 20:49:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:23,142 INFO L225 Difference]: With dead ends: 97 [2022-11-02 20:49:23,143 INFO L226 Difference]: Without dead ends: 97 [2022-11-02 20:49:23,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:49:23,147 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 8 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:23,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 323 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-02 20:49:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-02 20:49:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 92 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2022-11-02 20:49:23,173 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 28 [2022-11-02 20:49:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:23,174 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2022-11-02 20:49:23,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:49:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2022-11-02 20:49:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:49:23,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:23,177 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:23,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:49:23,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:23,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash -888530816, now seen corresponding path program 2 times [2022-11-02 20:49:23,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:23,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603717739] [2022-11-02 20:49:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:23,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:23,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:24,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:24,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:49:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:24,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603717739] [2022-11-02 20:49:24,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603717739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:24,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:24,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:49:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927286684] [2022-11-02 20:49:24,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:24,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:49:24,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:24,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:49:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:49:24,129 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:24,311 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2022-11-02 20:49:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:49:24,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-02 20:49:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:24,313 INFO L225 Difference]: With dead ends: 105 [2022-11-02 20:49:24,313 INFO L226 Difference]: Without dead ends: 105 [2022-11-02 20:49:24,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:49:24,315 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 149 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:24,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 168 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:49:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-02 20:49:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2022-11-02 20:49:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 88 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2022-11-02 20:49:24,340 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 41 [2022-11-02 20:49:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:24,340 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2022-11-02 20:49:24,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2022-11-02 20:49:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:49:24,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:24,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:24,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:49:24,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash -888530815, now seen corresponding path program 1 times [2022-11-02 20:49:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:24,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883758964] [2022-11-02 20:49:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:24,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:25,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:25,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:25,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:49:25,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:25,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883758964] [2022-11-02 20:49:25,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883758964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623299937] [2022-11-02 20:49:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:25,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:25,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:25,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:25,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:49:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:49:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:25,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:49:25,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:49:25,689 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_2| |c_#length|))) (and (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_2| .cse0 (select |c_#length| .cse0))) (<= 4 (select |v_#length_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#s~0#1.base|))))) (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|))) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|)) is different from false [2022-11-02 20:49:25,692 WARN L855 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_2| |c_#length|))) (and (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_2| .cse0 (select |c_#length| .cse0))) (<= 4 (select |v_#length_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#s~0#1.base|))))) (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|))) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|)) is different from true [2022-11-02 20:49:25,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:49:25,897 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_4| |c_#length|))) (and (<= 4 (select |v_#length_BEFORE_CALL_4| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_4| .cse0 (select |c_#length| .cse0)))))) (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|))) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|)) is different from false [2022-11-02 20:49:25,901 WARN L855 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_4| |c_#length|))) (and (<= 4 (select |v_#length_BEFORE_CALL_4| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_4| .cse0 (select |c_#length| .cse0)))))) (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|))) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|)) is different from true [2022-11-02 20:49:25,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:49:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 1 not checked. [2022-11-02 20:49:26,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:28,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623299937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:28,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:49:28,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-02 20:49:28,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556162404] [2022-11-02 20:49:28,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:49:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:28,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:49:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=101, Unknown=4, NotChecked=42, Total=182 [2022-11-02 20:49:28,278 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:49:28,332 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|)))) (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_2| |c_#length|))) (and (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_2| .cse0 (select |c_#length| .cse0))) (<= 4 (select |v_#length_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#s~0#1.base|))))) .cse1) (or (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (let ((.cse2 (@diff |v_#length_BEFORE_CALL_4| |c_#length|))) (and (<= 4 (select |v_#length_BEFORE_CALL_4| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ .cse2 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_4| .cse2 (select |c_#length| .cse2)))))) .cse1) .cse1 (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|))) is different from false [2022-11-02 20:49:28,342 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|)))) (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_2| |c_#length|))) (and (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_2| .cse0 (select |c_#length| .cse0))) (<= 4 (select |v_#length_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#s~0#1.base|))))) .cse1) (or (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (let ((.cse2 (@diff |v_#length_BEFORE_CALL_4| |c_#length|))) (and (<= 4 (select |v_#length_BEFORE_CALL_4| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ .cse2 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_4| .cse2 (select |c_#length| .cse2)))))) .cse1) .cse1 (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|))) is different from true [2022-11-02 20:49:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:28,559 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-11-02 20:49:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:49:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-11-02 20:49:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:28,560 INFO L225 Difference]: With dead ends: 101 [2022-11-02 20:49:28,561 INFO L226 Difference]: Without dead ends: 101 [2022-11-02 20:49:28,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=53, Invalid=135, Unknown=6, NotChecked=78, Total=272 [2022-11-02 20:49:28,561 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 163 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:28,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 119 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-11-02 20:49:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-02 20:49:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2022-11-02 20:49:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.55) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-11-02 20:49:28,566 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 41 [2022-11-02 20:49:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:28,567 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-11-02 20:49:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:49:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-11-02 20:49:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:49:28,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:28,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:28,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:28,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:28,787 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:28,788 INFO L85 PathProgramCache]: Analyzing trace with hash -338093919, now seen corresponding path program 1 times [2022-11-02 20:49:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860836888] [2022-11-02 20:49:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:29,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:29,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:29,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:49:29,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860836888] [2022-11-02 20:49:29,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860836888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694701024] [2022-11-02 20:49:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:29,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:29,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:29,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:29,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:49:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:49:29,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:30,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-11-02 20:49:30,156 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_614 (Array Int Int)) (|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_614)))) is different from true [2022-11-02 20:49:30,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:49:30,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:49:30,234 INFO L356 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-11-02 20:49:30,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2022-11-02 20:49:30,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-02 20:49:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:49:30,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:30,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694701024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:30,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:49:30,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 24 [2022-11-02 20:49:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897424017] [2022-11-02 20:49:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:30,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:49:30,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:49:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=483, Unknown=1, NotChecked=44, Total=600 [2022-11-02 20:49:30,287 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:30,856 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2022-11-02 20:49:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:49:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-02 20:49:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:30,858 INFO L225 Difference]: With dead ends: 158 [2022-11-02 20:49:30,858 INFO L226 Difference]: Without dead ends: 158 [2022-11-02 20:49:30,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=716, Unknown=1, NotChecked=56, Total=930 [2022-11-02 20:49:30,861 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 485 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:30,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 343 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 393 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-11-02 20:49:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-02 20:49:30,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 91. [2022-11-02 20:49:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.564516129032258) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2022-11-02 20:49:30,869 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 44 [2022-11-02 20:49:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:30,876 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2022-11-02 20:49:30,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2022-11-02 20:49:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:49:30,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:30,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:30,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:31,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:31,100 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:31,100 INFO L85 PathProgramCache]: Analyzing trace with hash -338093918, now seen corresponding path program 1 times [2022-11-02 20:49:31,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:31,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884245955] [2022-11-02 20:49:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:31,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:31,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:31,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:31,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:49:32,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884245955] [2022-11-02 20:49:32,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884245955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025924433] [2022-11-02 20:49:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:32,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:32,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:32,376 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:32,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:49:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-02 20:49:32,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:32,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-02 20:49:32,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-02 20:49:33,129 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_773 (Array Int Int)) (v_ArrVal_772 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_772)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_773)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-02 20:49:33,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:49:33,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-02 20:49:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:49:33,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2022-11-02 20:49:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:49:33,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-02 20:49:33,225 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:49:33,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-02 20:49:33,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-02 20:49:33,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-02 20:49:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:49:33,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:33,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025924433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:33,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:49:33,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17] total 27 [2022-11-02 20:49:33,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250566114] [2022-11-02 20:49:33,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:33,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:49:33,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:33,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:49:33,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=630, Unknown=1, NotChecked=50, Total=756 [2022-11-02 20:49:33,368 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:34,172 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2022-11-02 20:49:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:49:34,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-02 20:49:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:34,174 INFO L225 Difference]: With dead ends: 147 [2022-11-02 20:49:34,174 INFO L226 Difference]: Without dead ends: 147 [2022-11-02 20:49:34,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=999, Unknown=1, NotChecked=64, Total=1190 [2022-11-02 20:49:34,175 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 221 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:34,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 378 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 432 Invalid, 0 Unknown, 147 Unchecked, 0.4s Time] [2022-11-02 20:49:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-02 20:49:34,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2022-11-02 20:49:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2022-11-02 20:49:34,182 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 44 [2022-11-02 20:49:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:34,183 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2022-11-02 20:49:34,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2022-11-02 20:49:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:49:34,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:34,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:34,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-02 20:49:34,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:34,399 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1890978520, now seen corresponding path program 1 times [2022-11-02 20:49:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:34,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217953611] [2022-11-02 20:49:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:49:34,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:34,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217953611] [2022-11-02 20:49:34,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217953611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:34,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:34,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:34,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286675016] [2022-11-02 20:49:34,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:34,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:34,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:34,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:34,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:34,495 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:34,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:34,580 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2022-11-02 20:49:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:49:34,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-11-02 20:49:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:34,582 INFO L225 Difference]: With dead ends: 143 [2022-11-02 20:49:34,582 INFO L226 Difference]: Without dead ends: 143 [2022-11-02 20:49:34,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:34,583 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 58 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:34,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 211 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-02 20:49:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 92. [2022-11-02 20:49:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 87 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-11-02 20:49:34,588 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 45 [2022-11-02 20:49:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:34,588 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-11-02 20:49:34,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-11-02 20:49:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:49:34,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:34,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:34,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:49:34,591 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1509213013, now seen corresponding path program 1 times [2022-11-02 20:49:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:34,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059609966] [2022-11-02 20:49:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:49:34,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:34,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059609966] [2022-11-02 20:49:34,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059609966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:34,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:34,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:49:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130744469] [2022-11-02 20:49:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:34,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:49:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:49:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:49:34,795 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:34,958 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2022-11-02 20:49:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:49:34,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-11-02 20:49:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:34,960 INFO L225 Difference]: With dead ends: 103 [2022-11-02 20:49:34,960 INFO L226 Difference]: Without dead ends: 103 [2022-11-02 20:49:34,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:49:34,961 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 64 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:34,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 263 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-02 20:49:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2022-11-02 20:49:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2022-11-02 20:49:34,966 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 46 [2022-11-02 20:49:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:34,967 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2022-11-02 20:49:34,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2022-11-02 20:49:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:49:34,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:34,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:34,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:49:34,969 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:34,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:34,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1509213014, now seen corresponding path program 1 times [2022-11-02 20:49:34,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:34,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286399801] [2022-11-02 20:49:34,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:34,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 20:49:35,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:35,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286399801] [2022-11-02 20:49:35,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286399801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:35,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811679377] [2022-11-02 20:49:35,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:35,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:35,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:35,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:35,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:49:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:49:35,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:49:35,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:35,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811679377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:35,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:49:35,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-02 20:49:35,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187959690] [2022-11-02 20:49:35,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:35,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:35,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:35,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:49:35,438 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:35,459 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-11-02 20:49:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:49:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-11-02 20:49:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:35,461 INFO L225 Difference]: With dead ends: 90 [2022-11-02 20:49:35,461 INFO L226 Difference]: Without dead ends: 90 [2022-11-02 20:49:35,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:49:35,462 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 75 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:35,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 171 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-02 20:49:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-02 20:49:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.5161290322580645) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2022-11-02 20:49:35,467 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 46 [2022-11-02 20:49:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:35,468 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2022-11-02 20:49:35,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2022-11-02 20:49:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:49:35,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:35,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:35,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:35,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:35,687 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash -457619027, now seen corresponding path program 1 times [2022-11-02 20:49:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:35,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930597795] [2022-11-02 20:49:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:35,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 20:49:35,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:35,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930597795] [2022-11-02 20:49:35,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930597795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:35,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277223491] [2022-11-02 20:49:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:35,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:35,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:35,974 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:36,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:49:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:36,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:49:36,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:49:36,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:49:36,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277223491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:36,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:49:36,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-11-02 20:49:36,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266989333] [2022-11-02 20:49:36,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:36,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:36,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:36,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:49:36,270 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:36,301 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-11-02 20:49:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:49:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-11-02 20:49:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:36,302 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:49:36,302 INFO L226 Difference]: Without dead ends: 87 [2022-11-02 20:49:36,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:49:36,303 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 192 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:36,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 113 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-02 20:49:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-02 20:49:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 82 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2022-11-02 20:49:36,307 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 47 [2022-11-02 20:49:36,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:36,308 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2022-11-02 20:49:36,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:49:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2022-11-02 20:49:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:49:36,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:36,313 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:36,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:36,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:49:36,539 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:36,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289572, now seen corresponding path program 1 times [2022-11-02 20:49:36,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:36,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564900308] [2022-11-02 20:49:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:36,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:36,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:49:36,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:36,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564900308] [2022-11-02 20:49:36,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564900308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:36,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:36,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:36,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449910712] [2022-11-02 20:49:36,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:36,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:36,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:36,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:36,665 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:36,808 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-11-02 20:49:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:49:36,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-02 20:49:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:36,810 INFO L225 Difference]: With dead ends: 98 [2022-11-02 20:49:36,810 INFO L226 Difference]: Without dead ends: 98 [2022-11-02 20:49:36,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:49:36,813 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 57 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:36,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 172 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-02 20:49:36,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2022-11-02 20:49:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.459016393442623) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-11-02 20:49:36,818 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 48 [2022-11-02 20:49:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:36,818 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-11-02 20:49:36,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-11-02 20:49:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:49:36,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:36,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:49:36,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:36,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289571, now seen corresponding path program 1 times [2022-11-02 20:49:36,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:36,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838534471] [2022-11-02 20:49:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:36,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:36,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:49:37,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838534471] [2022-11-02 20:49:37,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838534471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:37,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:37,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:37,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602466744] [2022-11-02 20:49:37,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:37,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:37,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:37,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:37,024 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:37,147 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-11-02 20:49:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:49:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-02 20:49:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:37,149 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:49:37,149 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:49:37,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:49:37,149 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 59 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:37,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:49:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-02 20:49:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 80 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-11-02 20:49:37,153 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 48 [2022-11-02 20:49:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:37,153 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-11-02 20:49:37,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-11-02 20:49:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:49:37,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:37,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:37,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:49:37,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:37,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1685271038, now seen corresponding path program 1 times [2022-11-02 20:49:37,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:37,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173738080] [2022-11-02 20:49:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:37,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 20:49:37,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:37,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173738080] [2022-11-02 20:49:37,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173738080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:37,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:37,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:49:37,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482315114] [2022-11-02 20:49:37,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:37,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:49:37,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:37,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:49:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:49:37,488 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:37,660 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2022-11-02 20:49:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:49:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-11-02 20:49:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:37,661 INFO L225 Difference]: With dead ends: 84 [2022-11-02 20:49:37,662 INFO L226 Difference]: Without dead ends: 84 [2022-11-02 20:49:37,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:49:37,662 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 58 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:37,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 262 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-02 20:49:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-02 20:49:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 79 states have internal predecessors, (87), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:49:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2022-11-02 20:49:37,666 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 49 [2022-11-02 20:49:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:37,666 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2022-11-02 20:49:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:49:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2022-11-02 20:49:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:49:37,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:37,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:37,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:49:37,667 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-02 20:49:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1171904341, now seen corresponding path program 1 times [2022-11-02 20:49:37,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:37,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467557211] [2022-11-02 20:49:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:37,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:38,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:49:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:38,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:49:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:38,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:49:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:49:38,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:38,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467557211] [2022-11-02 20:49:38,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467557211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:38,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873403828] [2022-11-02 20:49:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:38,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:38,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:38,909 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:38,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c221702e-332f-459f-ac4a-080bfdf85571/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:49:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:39,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 20:49:39,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:39,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-02 20:49:39,641 WARN L855 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (not (= |c_node_create_~temp~0#1.base| 0)) (exists ((v_ArrVal_1775 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1775) |c_#memory_$Pointer$.base|))) is different from true [2022-11-02 20:49:39,651 WARN L855 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1775 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_1775) |c_#memory_$Pointer$.base|)) (not (= |c_node_create_#res#1.base| 0))) is different from true [2022-11-02 20:49:39,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:49:39,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-02 20:49:40,183 INFO L356 Elim1Store]: treesize reduction 36, result has 56.6 percent of original size [2022-11-02 20:49:40,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 63 [2022-11-02 20:49:43,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:49:43,363 INFO L356 Elim1Store]: treesize reduction 108, result has 61.8 percent of original size [2022-11-02 20:49:43,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 100 treesize of output 264