./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:32:39,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:32:39,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:32:39,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:32:39,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:32:39,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:32:39,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:32:39,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:32:39,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:32:39,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:32:39,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:32:39,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:32:39,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:32:39,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:32:39,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:32:39,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:32:39,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:32:39,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:32:39,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:32:39,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:32:39,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:32:39,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:32:39,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:32:39,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:32:39,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:32:39,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:32:39,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:32:39,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:32:39,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:32:39,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:32:39,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:32:39,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:32:39,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:32:39,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:32:39,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:32:39,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:32:39,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:32:39,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:32:39,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:32:39,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:32:39,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:32:39,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 16:32:39,452 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:32:39,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:32:39,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:32:39,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:32:39,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:32:39,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:32:39,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:32:39,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:32:39,454 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:32:39,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:32:39,454 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:32:39,455 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:32:39,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:32:39,455 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:32:39,455 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:32:39,455 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:32:39,455 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:32:39,456 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:32:39,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:32:39,456 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:32:39,456 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:32:39,456 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:32:39,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:32:39,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:32:39,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:32:39,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:32:39,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:32:39,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:32:39,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:32:39,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:32:39,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:32:39,458 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:32:39,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:32:39,458 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:32:39,458 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 [2022-12-13 16:32:39,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:32:39,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:32:39,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:32:39,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:32:39,682 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:32:39,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2022-12-13 16:32:42,143 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:32:42,338 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:32:42,338 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2022-12-13 16:32:42,348 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/data/4873bbdc4/3aaa57f0a400401cb7faedc1bcd1eb94/FLAG078fc93aa [2022-12-13 16:32:42,700 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/data/4873bbdc4/3aaa57f0a400401cb7faedc1bcd1eb94 [2022-12-13 16:32:42,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:32:42,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:32:42,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:32:42,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:32:42,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:32:42,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:42,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62aeb512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42, skipping insertion in model container [2022-12-13 16:32:42,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:42,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:32:42,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:32:42,918 WARN L237 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_7775e87a-5257-498a-a08b-514b0cb90380/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i[24729,24742] [2022-12-13 16:32:42,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:32:42,927 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:32:42,956 WARN L237 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_7775e87a-5257-498a-a08b-514b0cb90380/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i[24729,24742] [2022-12-13 16:32:42,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:32:42,972 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:32:42,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42 WrapperNode [2022-12-13 16:32:42,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:32:42,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:32:42,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:32:42,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:32:42,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:42,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,004 INFO L138 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2022-12-13 16:32:43,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:32:43,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:32:43,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:32:43,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:32:43,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,024 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:32:43,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:32:43,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:32:43,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:32:43,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (1/1) ... [2022-12-13 16:32:43,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:32:43,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:43,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:32:43,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:32:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:32:43,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:32:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-12-13 16:32:43,083 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-12-13 16:32:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:32:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:32:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:32:43,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 16:32:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 16:32:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:32:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 16:32:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:32:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:32:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:32:43,172 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:32:43,173 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:32:43,515 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:32:43,522 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:32:43,523 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 16:32:43,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:32:43 BoogieIcfgContainer [2022-12-13 16:32:43,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:32:43,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:32:43,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:32:43,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:32:43,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:32:42" (1/3) ... [2022-12-13 16:32:43,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34133164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:32:43, skipping insertion in model container [2022-12-13 16:32:43,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:32:42" (2/3) ... [2022-12-13 16:32:43,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34133164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:32:43, skipping insertion in model container [2022-12-13 16:32:43,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:32:43" (3/3) ... [2022-12-13 16:32:43,534 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_unequal.i [2022-12-13 16:32:43,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:32:43,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-12-13 16:32:43,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:32:43,594 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a43ddf1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:32:43,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-12-13 16:32:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) [2022-12-13 16:32:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 16:32:43,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:43,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:32:43,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:43,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 895672562, now seen corresponding path program 1 times [2022-12-13 16:32:43,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:43,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704201147] [2022-12-13 16:32:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:43,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:43,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:43,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704201147] [2022-12-13 16:32:43,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704201147] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:43,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:43,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:32:43,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577329658] [2022-12-13 16:32:43,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:43,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:32:43,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:43,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:32:43,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:32:43,856 INFO L87 Difference]: Start difference. First operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-13 16:32:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:43,991 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-12-13 16:32:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:32:43,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-12-13 16:32:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:44,002 INFO L225 Difference]: With dead ends: 135 [2022-12-13 16:32:44,002 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 16:32:44,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:32:44,007 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:44,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:32:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 16:32:44,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-12-13 16:32:44,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.014925373134328) internal successors, (135), 127 states have internal predecessors, (135), 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) [2022-12-13 16:32:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2022-12-13 16:32:44,042 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2022-12-13 16:32:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:44,042 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2022-12-13 16:32:44,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-13 16:32:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2022-12-13 16:32:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 16:32:44,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:44,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:32:44,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:32:44,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash 895672563, now seen corresponding path program 1 times [2022-12-13 16:32:44,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:44,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363939114] [2022-12-13 16:32:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:44,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:44,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363939114] [2022-12-13 16:32:44,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363939114] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:44,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:44,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:32:44,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895602203] [2022-12-13 16:32:44,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:44,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:32:44,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:44,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:32:44,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:32:44,135 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-13 16:32:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:44,222 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-12-13 16:32:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:32:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-12-13 16:32:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:44,224 INFO L225 Difference]: With dead ends: 129 [2022-12-13 16:32:44,224 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 16:32:44,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:32:44,225 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:44,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:32:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 16:32:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-12-13 16:32:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 124 states have internal predecessors, (132), 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) [2022-12-13 16:32:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-12-13 16:32:44,235 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 6 [2022-12-13 16:32:44,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:44,235 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-12-13 16:32:44,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-12-13 16:32:44,235 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-12-13 16:32:44,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 16:32:44,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:44,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:44,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:32:44,236 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:44,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:44,237 INFO L85 PathProgramCache]: Analyzing trace with hash -753542016, now seen corresponding path program 1 times [2022-12-13 16:32:44,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:44,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195981994] [2022-12-13 16:32:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:44,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:44,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:44,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195981994] [2022-12-13 16:32:44,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195981994] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:44,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:44,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:32:44,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301843304] [2022-12-13 16:32:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:32:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:32:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:32:44,346 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-13 16:32:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:44,473 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2022-12-13 16:32:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:32:44,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2022-12-13 16:32:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:44,474 INFO L225 Difference]: With dead ends: 140 [2022-12-13 16:32:44,474 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 16:32:44,474 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 [2022-12-13 16:32:44,475 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:44,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:32:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 16:32:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-12-13 16:32:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 125 states have internal predecessors, (133), 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) [2022-12-13 16:32:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2022-12-13 16:32:44,482 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 14 [2022-12-13 16:32:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:44,482 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2022-12-13 16:32:44,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-12-13 16:32:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2022-12-13 16:32:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 16:32:44,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:44,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:44,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:32:44,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash 265974304, now seen corresponding path program 1 times [2022-12-13 16:32:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:44,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852813811] [2022-12-13 16:32:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:44,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:44,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:44,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:32:44,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:44,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852813811] [2022-12-13 16:32:44,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852813811] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:44,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:44,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:32:44,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014032072] [2022-12-13 16:32:44,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:44,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:32:44,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:32:44,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:32:44,663 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-12-13 16:32:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:44,874 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-12-13 16:32:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:32:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 24 [2022-12-13 16:32:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:44,876 INFO L225 Difference]: With dead ends: 130 [2022-12-13 16:32:44,876 INFO L226 Difference]: Without dead ends: 130 [2022-12-13 16:32:44,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:32:44,877 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 21 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:44,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 426 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:32:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-13 16:32:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-12-13 16:32:44,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 124 states have internal predecessors, (132), 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) [2022-12-13 16:32:44,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-12-13 16:32:44,882 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 24 [2022-12-13 16:32:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:44,883 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-12-13 16:32:44,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-12-13 16:32:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-12-13 16:32:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 16:32:44,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:44,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:44,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:32:44,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash 265974305, now seen corresponding path program 1 times [2022-12-13 16:32:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:44,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945858843] [2022-12-13 16:32:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:44,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:45,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:45,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:45,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945858843] [2022-12-13 16:32:45,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945858843] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:45,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:45,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:32:45,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232189824] [2022-12-13 16:32:45,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:45,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:32:45,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:45,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:32:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:32:45,069 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-12-13 16:32:45,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:45,285 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-12-13 16:32:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:32:45,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 24 [2022-12-13 16:32:45,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:45,286 INFO L225 Difference]: With dead ends: 129 [2022-12-13 16:32:45,286 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 16:32:45,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:32:45,287 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 19 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:45,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 450 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:32:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 16:32:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-12-13 16:32:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 123 states have internal predecessors, (131), 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) [2022-12-13 16:32:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-12-13 16:32:45,291 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 24 [2022-12-13 16:32:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:45,292 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-12-13 16:32:45,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-12-13 16:32:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-12-13 16:32:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 16:32:45,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:45,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:45,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:32:45,293 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731903, now seen corresponding path program 1 times [2022-12-13 16:32:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:45,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808111071] [2022-12-13 16:32:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:45,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:45,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:45,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808111071] [2022-12-13 16:32:45,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808111071] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:45,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246947913] [2022-12-13 16:32:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:45,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:45,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:45,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:45,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:32:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:45,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 16:32:45,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:45,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:32:45,683 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_352 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_352))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-12-13 16:32:45,756 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 16:32:45,757 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 21 [2022-12-13 16:32:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 16:32:45,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:45,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246947913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:45,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:32:45,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-12-13 16:32:45,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305990991] [2022-12-13 16:32:45,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:32:45,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:45,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:32:45,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-12-13 16:32:45,824 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:32:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:46,129 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2022-12-13 16:32:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:32:46,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-12-13 16:32:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:46,130 INFO L225 Difference]: With dead ends: 153 [2022-12-13 16:32:46,131 INFO L226 Difference]: Without dead ends: 153 [2022-12-13 16:32:46,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-12-13 16:32:46,132 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 107 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:46,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 404 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 453 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-12-13 16:32:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-13 16:32:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2022-12-13 16:32:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 127 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:32:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2022-12-13 16:32:46,138 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 26 [2022-12-13 16:32:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:46,138 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2022-12-13 16:32:46,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:32:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2022-12-13 16:32:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 16:32:46,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:46,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:46,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:32:46,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:46,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:46,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731902, now seen corresponding path program 1 times [2022-12-13 16:32:46,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:46,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578722204] [2022-12-13 16:32:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:46,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:46,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:46,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:46,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578722204] [2022-12-13 16:32:46,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578722204] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253589712] [2022-12-13 16:32:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:46,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:46,718 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:46,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:32:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 16:32:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:46,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:32:47,064 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:32:47,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 16:32:47,078 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:32:47,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:32:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:47,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:49,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253589712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:49,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:32:49,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2022-12-13 16:32:49,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634056484] [2022-12-13 16:32:49,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:49,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:32:49,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:32:49,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:32:49,267 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 16:32:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:50,032 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-12-13 16:32:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:32:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-12-13 16:32:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:50,034 INFO L225 Difference]: With dead ends: 135 [2022-12-13 16:32:50,034 INFO L226 Difference]: Without dead ends: 135 [2022-12-13 16:32:50,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-12-13 16:32:50,035 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 15 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:50,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 976 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 16:32:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-13 16:32:50,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-12-13 16:32:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:32:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2022-12-13 16:32:50,039 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 26 [2022-12-13 16:32:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:50,040 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2022-12-13 16:32:50,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 16:32:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2022-12-13 16:32:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 16:32:50,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:50,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:50,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:32:50,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 16:32:50,242 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:50,243 INFO L85 PathProgramCache]: Analyzing trace with hash -619542825, now seen corresponding path program 1 times [2022-12-13 16:32:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759037044] [2022-12-13 16:32:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:50,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:50,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:50,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759037044] [2022-12-13 16:32:50,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759037044] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:50,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614680167] [2022-12-13 16:32:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:50,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:50,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:50,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:50,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:32:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:32:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:50,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:50,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614680167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:50,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:50,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-12-13 16:32:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036755592] [2022-12-13 16:32:50,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:50,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:32:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:32:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:32:50,689 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:32:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:50,841 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2022-12-13 16:32:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:32:50,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-13 16:32:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:50,842 INFO L225 Difference]: With dead ends: 134 [2022-12-13 16:32:50,842 INFO L226 Difference]: Without dead ends: 134 [2022-12-13 16:32:50,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:32:50,843 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 4 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:50,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 660 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:32:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-13 16:32:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-12-13 16:32:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.875) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:32:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-12-13 16:32:50,849 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 28 [2022-12-13 16:32:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:50,849 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-12-13 16:32:50,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:32:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-12-13 16:32:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 16:32:50,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:50,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:50,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:32:51,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:51,052 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:51,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739054, now seen corresponding path program 1 times [2022-12-13 16:32:51,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:51,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802689849] [2022-12-13 16:32:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:51,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:51,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:51,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:32:51,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:51,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802689849] [2022-12-13 16:32:51,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802689849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:51,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694377749] [2022-12-13 16:32:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:51,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:51,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:51,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:51,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:32:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 16:32:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:32:51,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:51,366 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 16:32:51,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-12-13 16:32:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:32:51,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694377749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:51,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:51,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-12-13 16:32:51,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256949460] [2022-12-13 16:32:51,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:51,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:32:51,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:51,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:32:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:32:51,387 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:32:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:51,550 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2022-12-13 16:32:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:32:51,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-12-13 16:32:51,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:51,551 INFO L225 Difference]: With dead ends: 138 [2022-12-13 16:32:51,551 INFO L226 Difference]: Without dead ends: 138 [2022-12-13 16:32:51,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:32:51,552 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 11 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:51,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 429 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:32:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-13 16:32:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-12-13 16:32:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:32:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-12-13 16:32:51,563 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 29 [2022-12-13 16:32:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:51,563 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-12-13 16:32:51,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:32:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-12-13 16:32:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 16:32:51,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:51,564 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:51,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:32:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:51,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:51,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739053, now seen corresponding path program 1 times [2022-12-13 16:32:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:51,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202565147] [2022-12-13 16:32:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:51,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:51,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:51,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:51,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:51,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202565147] [2022-12-13 16:32:51,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202565147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:51,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200909154] [2022-12-13 16:32:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:51,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:51,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:51,945 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:51,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:32:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:52,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 16:32:52,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:52,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:52,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:32:52,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-12-13 16:32:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:52,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200909154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:52,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:52,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-12-13 16:32:52,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845917981] [2022-12-13 16:32:52,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:52,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:32:52,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:52,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:32:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:32:52,268 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 16:32:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:52,549 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2022-12-13 16:32:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:32:52,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-12-13 16:32:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:52,550 INFO L225 Difference]: With dead ends: 143 [2022-12-13 16:32:52,550 INFO L226 Difference]: Without dead ends: 143 [2022-12-13 16:32:52,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:32:52,550 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 21 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:52,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1191 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:32:52,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-13 16:32:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2022-12-13 16:32:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:32:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2022-12-13 16:32:52,554 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 29 [2022-12-13 16:32:52,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:52,554 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2022-12-13 16:32:52,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 16:32:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2022-12-13 16:32:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 16:32:52,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:52,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:52,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:32:52,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:52,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:52,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:52,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598771, now seen corresponding path program 1 times [2022-12-13 16:32:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:52,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152406634] [2022-12-13 16:32:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:52,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:52,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:52,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:32:52,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:52,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152406634] [2022-12-13 16:32:52,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152406634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:52,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:52,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 16:32:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546118232] [2022-12-13 16:32:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:52,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:32:52,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:32:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:32:52,982 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-12-13 16:32:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:53,224 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-12-13 16:32:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:32:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 30 [2022-12-13 16:32:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:53,225 INFO L225 Difference]: With dead ends: 136 [2022-12-13 16:32:53,225 INFO L226 Difference]: Without dead ends: 136 [2022-12-13 16:32:53,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:32:53,225 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 24 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:53,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 475 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:32:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-13 16:32:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-12-13 16:32:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.84) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:32:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-12-13 16:32:53,229 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 30 [2022-12-13 16:32:53,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:53,229 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-12-13 16:32:53,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-12-13 16:32:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-12-13 16:32:53,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 16:32:53,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:53,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:53,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:32:53,230 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598772, now seen corresponding path program 1 times [2022-12-13 16:32:53,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:53,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612320211] [2022-12-13 16:32:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:32:53,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:53,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612320211] [2022-12-13 16:32:53,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612320211] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:53,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:53,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 16:32:53,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668187555] [2022-12-13 16:32:53,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:53,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:32:53,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:32:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:32:53,406 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-12-13 16:32:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:53,625 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2022-12-13 16:32:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:32:53,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2022-12-13 16:32:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:53,627 INFO L225 Difference]: With dead ends: 134 [2022-12-13 16:32:53,627 INFO L226 Difference]: Without dead ends: 134 [2022-12-13 16:32:53,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:32:53,627 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 20 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:53,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 505 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:32:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-13 16:32:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-12-13 16:32:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 128 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 16:32:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2022-12-13 16:32:53,631 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 30 [2022-12-13 16:32:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:53,632 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2022-12-13 16:32:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-12-13 16:32:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2022-12-13 16:32:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 16:32:53,633 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:53,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:53,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 16:32:53,633 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash 939320083, now seen corresponding path program 1 times [2022-12-13 16:32:53,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:53,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872934229] [2022-12-13 16:32:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:53,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:53,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:53,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 16:32:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 16:32:53,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872934229] [2022-12-13 16:32:53,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872934229] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005073054] [2022-12-13 16:32:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:53,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:53,727 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:53,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:32:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:53,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:32:53,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:32:53,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:32:53,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005073054] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:53,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:32:53,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-12-13 16:32:53,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046350211] [2022-12-13 16:32:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:53,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:32:53,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:53,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:32:53,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:32:53,863 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:32:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:53,874 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-12-13 16:32:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:32:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-12-13 16:32:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:53,875 INFO L225 Difference]: With dead ends: 122 [2022-12-13 16:32:53,875 INFO L226 Difference]: Without dead ends: 122 [2022-12-13 16:32:53,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:32:53,875 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:53,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 153 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:32:53,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-13 16:32:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-12-13 16:32:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 117 states have internal predecessors, (123), 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) [2022-12-13 16:32:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-12-13 16:32:53,877 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 41 [2022-12-13 16:32:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:53,878 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-12-13 16:32:53,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:32:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-12-13 16:32:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 16:32:53,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:53,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:53,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:32:54,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:32:54,079 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash -566913869, now seen corresponding path program 1 times [2022-12-13 16:32:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:54,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412182600] [2022-12-13 16:32:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:54,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:54,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:54,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:32:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:32:54,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412182600] [2022-12-13 16:32:54,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412182600] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:54,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115097084] [2022-12-13 16:32:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:54,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:54,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:54,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:54,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:32:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:54,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 16:32:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:54,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:32:54,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:32:54,627 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1582 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1582))))) is different from true [2022-12-13 16:32:54,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:54,667 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 14 [2022-12-13 16:32:54,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:32:54,691 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2022-12-13 16:32:54,709 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:32:54,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 16:32:54,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:32:54,759 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1584 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1584))))) is different from true [2022-12-13 16:32:54,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:54,789 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 14 [2022-12-13 16:32:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 21 not checked. [2022-12-13 16:32:54,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:54,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115097084] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:54,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:32:54,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-12-13 16:32:54,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024565030] [2022-12-13 16:32:54,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:54,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 16:32:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 16:32:54,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=125, Unknown=3, NotChecked=72, Total=240 [2022-12-13 16:32:54,840 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 16:32:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:55,129 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2022-12-13 16:32:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:32:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-12-13 16:32:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:55,130 INFO L225 Difference]: With dead ends: 132 [2022-12-13 16:32:55,130 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 16:32:55,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=166, Unknown=3, NotChecked=84, Total=306 [2022-12-13 16:32:55,131 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:55,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 262 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 357 Invalid, 0 Unknown, 342 Unchecked, 0.2s Time] [2022-12-13 16:32:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 16:32:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2022-12-13 16:32:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 68 states have (on average 1.6911764705882353) internal successors, (115), 109 states have internal predecessors, (115), 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) [2022-12-13 16:32:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2022-12-13 16:32:55,135 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 43 [2022-12-13 16:32:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:55,135 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2022-12-13 16:32:55,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 16:32:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2022-12-13 16:32:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 16:32:55,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:55,136 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:55,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 16:32:55,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:32:55,338 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:55,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:55,339 INFO L85 PathProgramCache]: Analyzing trace with hash -566913868, now seen corresponding path program 1 times [2022-12-13 16:32:55,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:55,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32244596] [2022-12-13 16:32:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:55,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:55,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:55,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:55,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:32:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 16:32:55,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32244596] [2022-12-13 16:32:55,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32244596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099127820] [2022-12-13 16:32:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:55,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:55,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:55,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:55,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:32:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:55,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 16:32:55,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:55,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:32:55,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:32:56,012 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1821 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1821) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-12-13 16:32:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:56,049 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 14 [2022-12-13 16:32:56,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:32:56,070 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1822 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1822))))) is different from true [2022-12-13 16:32:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:56,102 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 14 [2022-12-13 16:32:56,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:32:56,166 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1823 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1823) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-12-13 16:32:56,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:56,205 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 14 [2022-12-13 16:32:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 21 not checked. [2022-12-13 16:32:56,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:56,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099127820] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:56,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:32:56,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2022-12-13 16:32:56,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684680785] [2022-12-13 16:32:56,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:56,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 16:32:56,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 16:32:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=147, Unknown=3, NotChecked=78, Total=272 [2022-12-13 16:32:56,287 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 16:32:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:56,606 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2022-12-13 16:32:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:32:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-12-13 16:32:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:56,607 INFO L225 Difference]: With dead ends: 124 [2022-12-13 16:32:56,607 INFO L226 Difference]: Without dead ends: 124 [2022-12-13 16:32:56,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=215, Unknown=3, NotChecked=96, Total=380 [2022-12-13 16:32:56,608 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 261 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:56,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 302 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 474 Invalid, 0 Unknown, 375 Unchecked, 0.3s Time] [2022-12-13 16:32:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-13 16:32:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2022-12-13 16:32:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.5735294117647058) internal successors, (107), 101 states have internal predecessors, (107), 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) [2022-12-13 16:32:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2022-12-13 16:32:56,611 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 43 [2022-12-13 16:32:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:56,611 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2022-12-13 16:32:56,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 4.333333333333333) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 16:32:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2022-12-13 16:32:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 16:32:56,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:56,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:56,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:32:56,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 16:32:56,813 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:56,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:56,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1119645598, now seen corresponding path program 1 times [2022-12-13 16:32:56,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:56,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441173554] [2022-12-13 16:32:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:56,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:56,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:56,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:56,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:32:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 16:32:56,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441173554] [2022-12-13 16:32:56,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441173554] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:56,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:56,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:32:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478917364] [2022-12-13 16:32:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:32:56,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:32:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:32:56,917 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 16:32:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:57,070 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2022-12-13 16:32:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:32:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-12-13 16:32:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:57,072 INFO L225 Difference]: With dead ends: 120 [2022-12-13 16:32:57,072 INFO L226 Difference]: Without dead ends: 120 [2022-12-13 16:32:57,072 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 [2022-12-13 16:32:57,073 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 77 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:57,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 282 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:32:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-13 16:32:57,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2022-12-13 16:32:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 97 states have internal predecessors, (103), 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) [2022-12-13 16:32:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2022-12-13 16:32:57,076 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 46 [2022-12-13 16:32:57,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:57,077 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2022-12-13 16:32:57,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 16:32:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2022-12-13 16:32:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 16:32:57,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:57,077 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:57,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 16:32:57,078 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:57,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1119645597, now seen corresponding path program 1 times [2022-12-13 16:32:57,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:57,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421131443] [2022-12-13 16:32:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:57,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:57,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:57,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:32:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 16:32:57,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:57,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421131443] [2022-12-13 16:32:57,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421131443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:32:57,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:32:57,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:32:57,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867793952] [2022-12-13 16:32:57,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:32:57,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:32:57,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:57,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:32:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:32:57,256 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 16:32:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:57,430 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-12-13 16:32:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:32:57,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-12-13 16:32:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:57,431 INFO L225 Difference]: With dead ends: 98 [2022-12-13 16:32:57,431 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 16:32:57,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:32:57,432 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 76 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:57,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 293 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:32:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 16:32:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-12-13 16:32:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 93 states have internal predecessors, (99), 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) [2022-12-13 16:32:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2022-12-13 16:32:57,434 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 46 [2022-12-13 16:32:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:57,434 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2022-12-13 16:32:57,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 16:32:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2022-12-13 16:32:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 16:32:57,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:57,435 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:57,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 16:32:57,435 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:57,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634675, now seen corresponding path program 1 times [2022-12-13 16:32:57,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:57,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459119786] [2022-12-13 16:32:57,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:57,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:57,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:57,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:57,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:32:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 16:32:57,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459119786] [2022-12-13 16:32:57,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459119786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:57,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960187861] [2022-12-13 16:32:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:57,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:57,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:57,954 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:57,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:32:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 16:32:58,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:58,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:32:58,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-12-13 16:32:58,489 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2367 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2367))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2022-12-13 16:32:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:58,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 16:32:58,521 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-13 16:32:58,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 16:32:58,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 16:32:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-12-13 16:32:58,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:58,648 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_48| Int) (v_ArrVal_2373 (Array Int Int))) (or (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_48| 1) (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_48| v_ArrVal_2373) |c_ULTIMATE.start_dll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) 1) (not (< |v_node_create_~temp~0#1.base_48| |c_#StackHeapBarrier|)))) is different from false [2022-12-13 16:32:58,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960187861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:58,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:32:58,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-12-13 16:32:58,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763129477] [2022-12-13 16:32:58,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:32:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:32:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=573, Unknown=3, NotChecked=98, Total=756 [2022-12-13 16:32:58,652 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 16:32:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:32:59,283 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2022-12-13 16:32:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 16:32:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-12-13 16:32:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:32:59,283 INFO L225 Difference]: With dead ends: 115 [2022-12-13 16:32:59,283 INFO L226 Difference]: Without dead ends: 115 [2022-12-13 16:32:59,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=952, Unknown=5, NotChecked=130, Total=1260 [2022-12-13 16:32:59,284 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 432 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:32:59,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 476 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 679 Invalid, 3 Unknown, 120 Unchecked, 0.4s Time] [2022-12-13 16:32:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-13 16:32:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2022-12-13 16:32:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 68 states have (on average 1.4411764705882353) internal successors, (98), 92 states have internal predecessors, (98), 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) [2022-12-13 16:32:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-12-13 16:32:59,286 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 46 [2022-12-13 16:32:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:32:59,286 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-12-13 16:32:59,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 16:32:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-12-13 16:32:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 16:32:59,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:32:59,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:59,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:32:59,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 16:32:59,488 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:32:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:59,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634674, now seen corresponding path program 1 times [2022-12-13 16:32:59,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:59,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212163831] [2022-12-13 16:32:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:59,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:59,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:32:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:59,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:32:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:59,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:32:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:33:00,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212163831] [2022-12-13 16:33:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212163831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732319474] [2022-12-13 16:33:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:00,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:00,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:00,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:33:00,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:00,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 16:33:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:00,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:33:00,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-13 16:33:00,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 16:33:01,061 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_2607 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_2607) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_2612 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2612))) (exists ((v_ArrVal_2613 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2613))))) is different from true [2022-12-13 16:33:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:01,094 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 16:33:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:01,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-13 16:33:01,110 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 16:33:01,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 16:33:01,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:01,115 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-13 16:33:01,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 16:33:01,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 16:33:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-12-13 16:33:01,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:01,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732319474] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:01,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:33:01,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2022-12-13 16:33:01,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486987583] [2022-12-13 16:33:01,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:01,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:33:01,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:01,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:33:01,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=963, Unknown=2, NotChecked=62, Total=1122 [2022-12-13 16:33:01,437 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 16:33:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:33:02,820 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-12-13 16:33:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 16:33:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-12-13 16:33:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:33:02,821 INFO L225 Difference]: With dead ends: 96 [2022-12-13 16:33:02,821 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 16:33:02,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=220, Invalid=1759, Unknown=5, NotChecked=86, Total=2070 [2022-12-13 16:33:02,822 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 345 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 16:33:02,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 965 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1366 Invalid, 3 Unknown, 100 Unchecked, 0.8s Time] [2022-12-13 16:33:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 16:33:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-12-13 16:33:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 91 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) [2022-12-13 16:33:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-12-13 16:33:02,824 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 46 [2022-12-13 16:33:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:33:02,824 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-12-13 16:33:02,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 16:33:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-12-13 16:33:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 16:33:02,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:33:02,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:02,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 16:33:03,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:03,026 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:33:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:03,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1999401721, now seen corresponding path program 1 times [2022-12-13 16:33:03,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:03,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280437229] [2022-12-13 16:33:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:03,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:03,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:33:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:03,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:33:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:03,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:33:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:33:03,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:03,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280437229] [2022-12-13 16:33:03,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280437229] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772167843] [2022-12-13 16:33:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:03,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:03,506 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:03,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:33:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 16:33:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:03,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:33:03,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 16:33:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:03,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 16:33:03,900 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:33:03,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 16:33:03,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-13 16:33:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 16:33:03,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:33:03,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772167843] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:33:03,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:33:03,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [16] total 26 [2022-12-13 16:33:03,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309069365] [2022-12-13 16:33:03,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:33:03,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:33:03,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:03,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:33:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-12-13 16:33:03,977 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:33:04,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:33:04,283 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2022-12-13 16:33:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:33:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-12-13 16:33:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:33:04,284 INFO L225 Difference]: With dead ends: 113 [2022-12-13 16:33:04,284 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 16:33:04,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-12-13 16:33:04,285 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 223 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:33:04,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 329 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:33:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 16:33:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2022-12-13 16:33:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 88 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) [2022-12-13 16:33:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2022-12-13 16:33:04,286 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 51 [2022-12-13 16:33:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:33:04,287 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2022-12-13 16:33:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:33:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2022-12-13 16:33:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 16:33:04,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:33:04,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:04,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:33:04,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:04,489 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:33:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:04,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1999401722, now seen corresponding path program 1 times [2022-12-13 16:33:04,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:04,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419810945] [2022-12-13 16:33:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:04,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:04,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:33:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:04,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:33:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:04,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:33:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:33:04,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419810945] [2022-12-13 16:33:04,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419810945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:04,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126011079] [2022-12-13 16:33:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:04,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:04,836 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:04,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:33:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:04,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 16:33:05,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:05,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-13 16:33:05,267 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_3170 (Array Int Int))) (and (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_3170) |c_#memory_$Pointer$.base|) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|))) is different from true [2022-12-13 16:33:05,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:05,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-13 16:33:05,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-13 16:33:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-12-13 16:33:05,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:05,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126011079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:05,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:33:05,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2022-12-13 16:33:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529581010] [2022-12-13 16:33:05,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:05,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 16:33:05,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 16:33:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=614, Unknown=5, NotChecked=50, Total=756 [2022-12-13 16:33:05,419 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 16:33:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:33:05,918 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-12-13 16:33:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:33:05,918 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2022-12-13 16:33:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:33:05,919 INFO L225 Difference]: With dead ends: 90 [2022-12-13 16:33:05,919 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 16:33:05,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=956, Unknown=5, NotChecked=64, Total=1190 [2022-12-13 16:33:05,919 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 304 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:33:05,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 692 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 438 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-12-13 16:33:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 16:33:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-12-13 16:33:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 85 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) [2022-12-13 16:33:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-12-13 16:33:05,921 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 51 [2022-12-13 16:33:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:33:05,922 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-12-13 16:33:05,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 16:33:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-12-13 16:33:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 16:33:05,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:33:05,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:05,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 16:33:06,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 16:33:06,123 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:33:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1685641326, now seen corresponding path program 1 times [2022-12-13 16:33:06,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:06,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522224532] [2022-12-13 16:33:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:06,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:06,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:33:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:06,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:33:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:06,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:33:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 16:33:06,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:06,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522224532] [2022-12-13 16:33:06,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522224532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:33:06,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:33:06,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:33:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260210914] [2022-12-13 16:33:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:33:06,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:33:06,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:33:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:33:06,224 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 16:33:06,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:33:06,321 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-12-13 16:33:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:33:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-12-13 16:33:06,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:33:06,322 INFO L225 Difference]: With dead ends: 107 [2022-12-13 16:33:06,322 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 16:33:06,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:33:06,323 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 57 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:33:06,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 305 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:33:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 16:33:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2022-12-13 16:33:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 84 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) [2022-12-13 16:33:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-12-13 16:33:06,325 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 52 [2022-12-13 16:33:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:33:06,325 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-12-13 16:33:06,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 16:33:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-12-13 16:33:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 16:33:06,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:33:06,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:06,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 16:33:06,326 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:33:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1685641325, now seen corresponding path program 1 times [2022-12-13 16:33:06,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:06,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132721424] [2022-12-13 16:33:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:06,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:06,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:33:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:06,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:33:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:06,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:33:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 16:33:06,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:06,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132721424] [2022-12-13 16:33:06,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132721424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:33:06,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:33:06,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:33:06,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162869210] [2022-12-13 16:33:06,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:33:06,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:33:06,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:33:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:33:06,460 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 16:33:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:33:06,585 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-12-13 16:33:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:33:06,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-12-13 16:33:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:33:06,586 INFO L225 Difference]: With dead ends: 88 [2022-12-13 16:33:06,586 INFO L226 Difference]: Without dead ends: 88 [2022-12-13 16:33:06,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:33:06,587 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 60 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:33:06,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 303 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:33:06,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-13 16:33:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-13 16:33:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.353846153846154) internal successors, (88), 83 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) [2022-12-13 16:33:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-12-13 16:33:06,589 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 52 [2022-12-13 16:33:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:33:06,590 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-12-13 16:33:06,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 16:33:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-12-13 16:33:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 16:33:06,590 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:33:06,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:06,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 16:33:06,590 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:33:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:06,591 INFO L85 PathProgramCache]: Analyzing trace with hash -715273504, now seen corresponding path program 1 times [2022-12-13 16:33:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:06,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13399585] [2022-12-13 16:33:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:07,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:33:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:07,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:33:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:07,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:33:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:33:07,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:07,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13399585] [2022-12-13 16:33:07,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13399585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:07,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121122097] [2022-12-13 16:33:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:07,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:07,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:07,891 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:07,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:33:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 87 conjunts are in the unsatisfiable core [2022-12-13 16:33:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:08,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:33:08,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:33:08,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:33:08,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-13 16:33:08,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-12-13 16:33:08,501 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 16:33:08,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 16:33:08,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:08,771 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-13 16:33:08,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-12-13 16:33:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:08,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-12-13 16:33:08,805 INFO L321 Elim1Store]: treesize reduction 120, result has 31.4 percent of original size [2022-12-13 16:33:08,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 64 [2022-12-13 16:33:08,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-12-13 16:33:09,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:33:09,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-13 16:33:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:33:09,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:09,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121122097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:09,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:33:09,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 38 [2022-12-13 16:33:09,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152737726] [2022-12-13 16:33:09,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:09,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 16:33:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 16:33:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1593, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 16:33:09,382 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 16:33:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:33:11,514 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2022-12-13 16:33:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 16:33:11,514 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2022-12-13 16:33:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:33:11,515 INFO L225 Difference]: With dead ends: 105 [2022-12-13 16:33:11,515 INFO L226 Difference]: Without dead ends: 105 [2022-12-13 16:33:11,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=409, Invalid=3131, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 16:33:11,517 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 538 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:33:11,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 953 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 16:33:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-13 16:33:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2022-12-13 16:33:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 82 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) [2022-12-13 16:33:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-12-13 16:33:11,518 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 53 [2022-12-13 16:33:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:33:11,519 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-12-13 16:33:11,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.138888888888889) internal successors, (77), 34 states have internal predecessors, (77), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 16:33:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-12-13 16:33:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 16:33:11,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:33:11,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:11,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 16:33:11,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 16:33:11,720 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:33:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash -715273503, now seen corresponding path program 1 times [2022-12-13 16:33:11,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:11,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496179546] [2022-12-13 16:33:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:11,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:12,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:33:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:12,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:33:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:12,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:33:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:33:13,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:13,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496179546] [2022-12-13 16:33:13,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496179546] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:13,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184905646] [2022-12-13 16:33:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:13,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:13,727 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:13,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:33:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-13 16:33:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:13,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:33:14,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:33:14,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:33:14,383 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-12-13 16:33:14,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 44 [2022-12-13 16:33:14,396 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-12-13 16:33:14,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2022-12-13 16:33:14,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:33:14,407 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 16:33:14,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 16:33:14,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:14,752 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-13 16:33:14,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 83 [2022-12-13 16:33:14,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:14,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:14,763 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 16:33:14,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 71 [2022-12-13 16:33:14,779 INFO L321 Elim1Store]: treesize reduction 39, result has 48.7 percent of original size [2022-12-13 16:33:14,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 62 [2022-12-13 16:33:14,800 INFO L321 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2022-12-13 16:33:14,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-13 16:33:14,991 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-12-13 16:33:14,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 50 [2022-12-13 16:33:14,999 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-12-13 16:33:15,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2022-12-13 16:33:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:33:15,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:15,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184905646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:15,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:33:15,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 45 [2022-12-13 16:33:15,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892908053] [2022-12-13 16:33:15,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:15,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 16:33:15,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:15,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 16:33:15,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2388, Unknown=1, NotChecked=0, Total=2550 [2022-12-13 16:33:15,494 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 46 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 16:33:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:33:17,770 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-12-13 16:33:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 16:33:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-12-13 16:33:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:33:17,771 INFO L225 Difference]: With dead ends: 86 [2022-12-13 16:33:17,771 INFO L226 Difference]: Without dead ends: 86 [2022-12-13 16:33:17,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=361, Invalid=4330, Unknown=1, NotChecked=0, Total=4692 [2022-12-13 16:33:17,772 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 288 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:33:17,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1055 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 16:33:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-13 16:33:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-12-13 16:33:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.323076923076923) internal successors, (86), 81 states have internal predecessors, (86), 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) [2022-12-13 16:33:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-12-13 16:33:17,774 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 53 [2022-12-13 16:33:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:33:17,774 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-12-13 16:33:17,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 40 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 16:33:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-12-13 16:33:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 16:33:17,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:33:17,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:17,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 16:33:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:33:17,976 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:33:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash 821274968, now seen corresponding path program 1 times [2022-12-13 16:33:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:17,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366855314] [2022-12-13 16:33:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:17,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:19,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:33:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:33:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:33:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:33:19,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:19,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366855314] [2022-12-13 16:33:19,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366855314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:19,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150169768] [2022-12-13 16:33:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:19,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:19,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:19,790 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:19,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 16:33:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:19,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 114 conjunts are in the unsatisfiable core [2022-12-13 16:33:19,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:19,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:33:20,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:33:20,120 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:33:20,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:33:20,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:33:20,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:33:20,738 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-12-13 16:33:20,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 16 [2022-12-13 16:33:20,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:33:21,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:21,179 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-13 16:33:21,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 47 [2022-12-13 16:33:21,190 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 16:33:21,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 16:33:21,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:21,196 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 27 [2022-12-13 16:33:21,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-12-13 16:33:21,991 INFO L321 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2022-12-13 16:33:21,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 39 [2022-12-13 16:33:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:22,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:22,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-12-13 16:33:22,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:22,119 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2022-12-13 16:33:22,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:22,136 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2022-12-13 16:33:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:22,156 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:33:22,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2022-12-13 16:33:22,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 16:33:22,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-13 16:33:22,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 16:33:22,338 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:33:22,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2022-12-13 16:33:22,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:33:22,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-12-13 16:33:22,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-12-13 16:33:22,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-13 16:33:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:33:22,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:34:36,295 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:34:50,664 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:34:57,551 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 16:34:57,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:34:57,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 207 [2022-12-13 16:34:58,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150169768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:58,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:34:58,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 64 [2022-12-13 16:34:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826648800] [2022-12-13 16:34:58,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:34:58,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 16:34:58,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 16:34:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5832, Unknown=233, NotChecked=0, Total=6320 [2022-12-13 16:34:58,720 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 16:35:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:35:10,923 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-12-13 16:35:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 16:35:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 58 [2022-12-13 16:35:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:35:10,924 INFO L225 Difference]: With dead ends: 104 [2022-12-13 16:35:10,924 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 16:35:10,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 106.1s TimeCoverageRelationStatistics Valid=724, Invalid=10382, Unknown=236, NotChecked=0, Total=11342 [2022-12-13 16:35:10,926 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 970 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 61 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:35:10,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1019 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2253 Invalid, 3 Unknown, 0 Unchecked, 4.1s Time] [2022-12-13 16:35:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 16:35:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2022-12-13 16:35:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 79 states have internal predecessors, (84), 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) [2022-12-13 16:35:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-12-13 16:35:10,929 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 58 [2022-12-13 16:35:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:35:10,929 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-12-13 16:35:10,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 56 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 16:35:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-12-13 16:35:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 16:35:10,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:35:10,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:35:10,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 16:35:11,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 16:35:11,131 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-12-13 16:35:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:35:11,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1028736951, now seen corresponding path program 1 times [2022-12-13 16:35:11,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:35:11,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687336681] [2022-12-13 16:35:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:11,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:35:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:14,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 16:35:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:14,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 16:35:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:14,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 16:35:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:35:17,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:35:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687336681] [2022-12-13 16:35:17,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687336681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:35:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305461983] [2022-12-13 16:35:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:17,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:35:17,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:35:17,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:35:17,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7775e87a-5257-498a-a08b-514b0cb90380/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 16:35:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:17,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 136 conjunts are in the unsatisfiable core [2022-12-13 16:35:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:35:17,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:35:17,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 16:35:17,939 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:35:17,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 16:35:18,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 16:35:19,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:35:19,709 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-12-13 16:35:19,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 21 [2022-12-13 16:35:19,716 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 16:35:19,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 16:35:20,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 16:35:20,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:21,005 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-13 16:35:21,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 60 [2022-12-13 16:35:21,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:21,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 44 [2022-12-13 16:35:21,063 INFO L321 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2022-12-13 16:35:21,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-13 16:35:23,504 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-12-13 16:35:23,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 47 [2022-12-13 16:35:23,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2022-12-13 16:35:23,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:23,549 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 16:35:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:23,864 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 20 [2022-12-13 16:35:23,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:23,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:23,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 44 [2022-12-13 16:35:23,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:23,924 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-13 16:35:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:24,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-12-13 16:35:24,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-12-13 16:35:24,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:24,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 16:35:24,243 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 16:35:24,564 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-13 16:35:24,572 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-13 16:35:24,582 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-12-13 16:35:24,868 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 16:35:24,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 63 [2022-12-13 16:35:24,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:24,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2022-12-13 16:35:24,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:35:24,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-13 16:35:25,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2022-12-13 16:35:25,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-13 16:35:25,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 16:35:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:35:25,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:35:29,222 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4718 (Array Int Int)) (v_ArrVal_4719 (Array Int Int)) (v_ArrVal_4721 Int) (v_ArrVal_4722 (Array Int Int)) (v_ArrVal_4713 (Array Int Int)) (v_ArrVal_4714 (Array Int Int)) (v_ArrVal_4715 (Array Int Int)) (v_ArrVal_4716 (Array Int Int)) (v_ArrVal_4717 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4714) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4718))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_4721))) (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4713) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4717) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4722) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_4715) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_4716) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_4719) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)) |c_ULTIMATE.start_main_~uneq~0#1|)) is different from false [2022-12-13 16:35:33,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:35:33,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 250 [2022-12-13 16:35:33,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:35:33,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 544452 treesize of output 539470 [2022-12-13 16:35:33,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 623874 treesize of output 563458 [2022-12-13 16:35:34,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 605698 treesize of output 546306 [2022-12-13 16:35:35,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 612898 treesize of output 592674