./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:57:59,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:57:59,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:57:59,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:57:59,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:57:59,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:57:59,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:57:59,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:57:59,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:57:59,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:57:59,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:57:59,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:57:59,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:57:59,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:57:59,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:57:59,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:57:59,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:57:59,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:57:59,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:57:59,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:57:59,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:57:59,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:57:59,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:57:59,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:57:59,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:57:59,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:57:59,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:57:59,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:57:59,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:57:59,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:57:59,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:57:59,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:57:59,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:57:59,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:57:59,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:57:59,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:57:59,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:57:59,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:57:59,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:57:59,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:57:59,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:57:59,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:57:59,404 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:57:59,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:57:59,404 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:57:59,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:57:59,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:57:59,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:57:59,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:57:59,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:57:59,406 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:57:59,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:57:59,407 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:57:59,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:57:59,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:57:59,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:57:59,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:57:59,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:57:59,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:57:59,408 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:57:59,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:57:59,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:57:59,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:57:59,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:57:59,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:57:59,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:57:59,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:57:59,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:57:59,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:57:59,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:57:59,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:57:59,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:57:59,410 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:57:59,410 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:57:59,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:57:59,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:57:59,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a4c2149f6fe1f453f0ff04220f5041f2227f6654d0fa84d48205415ce284fcb [2021-12-06 18:57:59,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:57:59,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:57:59,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:57:59,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:57:59,623 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:57:59,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-12-06 18:57:59,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/data/77f3c367a/7e413c04e23b45949b7f39a05a4d58c8/FLAG0ec792e02 [2021-12-06 18:58:00,071 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:58:00,071 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i [2021-12-06 18:58:00,083 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/data/77f3c367a/7e413c04e23b45949b7f39a05a4d58c8/FLAG0ec792e02 [2021-12-06 18:58:00,092 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/data/77f3c367a/7e413c04e23b45949b7f39a05a4d58c8 [2021-12-06 18:58:00,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:58:00,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:58:00,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:58:00,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:58:00,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:58:00,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667340c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00, skipping insertion in model container [2021-12-06 18:58:00,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:58:00,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:58:00,305 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-12-06 18:58:00,308 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-12-06 18:58:00,310 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-12-06 18:58:00,312 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-12-06 18:58:00,313 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-12-06 18:58:00,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:58:00,322 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:58:00,349 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22663,22676] [2021-12-06 18:58:00,349 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22734,22747] [2021-12-06 18:58:00,351 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[22862,22875] [2021-12-06 18:58:00,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23275,23288] [2021-12-06 18:58:00,354 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/sv-benchmarks/c/forester-heap/sll-buckets-2.i[23364,23377] [2021-12-06 18:58:00,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:58:00,378 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:58:00,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00 WrapperNode [2021-12-06 18:58:00,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:58:00,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:58:00,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:58:00,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:58:00,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,395 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,413 INFO L137 Inliner]: procedures = 119, calls = 42, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 155 [2021-12-06 18:58:00,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:58:00,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:58:00,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:58:00,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:58:00,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:58:00,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:58:00,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:58:00,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:58:00,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (1/1) ... [2021-12-06 18:58:00,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:58:00,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:00,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:58:00,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:58:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:58:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:58:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:58:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:58:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:58:00,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:58:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:58:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:58:00,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:58:00,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:58:00,572 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:58:00,573 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:58:00,856 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:58:00,861 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:58:00,861 INFO L301 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-06 18:58:00,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:58:00 BoogieIcfgContainer [2021-12-06 18:58:00,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:58:00,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:58:00,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:58:00,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:58:00,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:58:00" (1/3) ... [2021-12-06 18:58:00,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48693e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:58:00, skipping insertion in model container [2021-12-06 18:58:00,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:58:00" (2/3) ... [2021-12-06 18:58:00,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48693e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:58:00, skipping insertion in model container [2021-12-06 18:58:00,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:58:00" (3/3) ... [2021-12-06 18:58:00,870 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-2.i [2021-12-06 18:58:00,875 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:58:00,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-12-06 18:58:00,913 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:58:00,919 INFO L339 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:58:00,919 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-12-06 18:58:00,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 18:58:00,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:00,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:00,939 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:00,946 INFO L85 PathProgramCache]: Analyzing trace with hash 179510098, now seen corresponding path program 1 times [2021-12-06 18:58:00,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:00,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514434968] [2021-12-06 18:58:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:00,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:01,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514434968] [2021-12-06 18:58:01,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514434968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:58:01,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:58:01,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:58:01,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412892895] [2021-12-06 18:58:01,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:58:01,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:58:01,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:58:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:58:01,219 INFO L87 Difference]: Start difference. First operand has 44 states, 38 states have (on average 1.868421052631579) internal successors, (71), 43 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:01,284 INFO L93 Difference]: Finished difference Result 112 states and 188 transitions. [2021-12-06 18:58:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:58:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 18:58:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:01,292 INFO L225 Difference]: With dead ends: 112 [2021-12-06 18:58:01,292 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 18:58:01,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:58:01,297 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 91 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:01,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 84 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:58:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 18:58:01,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2021-12-06 18:58:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-12-06 18:58:01,323 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 8 [2021-12-06 18:58:01,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:01,323 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-12-06 18:58:01,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-12-06 18:58:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:58:01,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:01,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:01,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:58:01,325 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:01,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:01,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1306111283, now seen corresponding path program 1 times [2021-12-06 18:58:01,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:01,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499074991] [2021-12-06 18:58:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:01,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:01,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:01,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499074991] [2021-12-06 18:58:01,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499074991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:58:01,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:58:01,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:58:01,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459441389] [2021-12-06 18:58:01,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:58:01,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:58:01,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:58:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:58:01,385 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:01,409 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-06 18:58:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:58:01,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 18:58:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:01,410 INFO L225 Difference]: With dead ends: 45 [2021-12-06 18:58:01,410 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 18:58:01,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:58:01,412 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:01,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:58:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 18:58:01,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2021-12-06 18:58:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-12-06 18:58:01,417 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 9 [2021-12-06 18:58:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:01,417 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-12-06 18:58:01,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-12-06 18:58:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:58:01,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:01,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:01,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:58:01,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:01,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1834780084, now seen corresponding path program 1 times [2021-12-06 18:58:01,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:01,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877529184] [2021-12-06 18:58:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:01,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:01,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:01,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877529184] [2021-12-06 18:58:01,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877529184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:58:01,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:58:01,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:58:01,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966414977] [2021-12-06 18:58:01,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:58:01,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:58:01,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:58:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:58:01,534 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:01,649 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-12-06 18:58:01,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:58:01,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:58:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:01,652 INFO L225 Difference]: With dead ends: 61 [2021-12-06 18:58:01,652 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 18:58:01,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:58:01,653 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:01,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 94 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:58:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 18:58:01,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-12-06 18:58:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-12-06 18:58:01,660 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 10 [2021-12-06 18:58:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:01,660 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-12-06 18:58:01,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-12-06 18:58:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:58:01,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:01,661 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:01,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:58:01,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:01,662 INFO L85 PathProgramCache]: Analyzing trace with hash 710639734, now seen corresponding path program 1 times [2021-12-06 18:58:01,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:01,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138558640] [2021-12-06 18:58:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:01,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:01,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:01,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138558640] [2021-12-06 18:58:01,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138558640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:58:01,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:58:01,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:58:01,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663932278] [2021-12-06 18:58:01,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:58:01,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:58:01,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:01,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:58:01,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:58:01,701 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:01,768 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-06 18:58:01,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:58:01,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 18:58:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:01,769 INFO L225 Difference]: With dead ends: 45 [2021-12-06 18:58:01,769 INFO L226 Difference]: Without dead ends: 43 [2021-12-06 18:58:01,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:58:01,770 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:01,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:58:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-06 18:58:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-12-06 18:58:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-12-06 18:58:01,775 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 10 [2021-12-06 18:58:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:01,775 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-12-06 18:58:01,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:01,776 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-12-06 18:58:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:58:01,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:01,776 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:01,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:58:01,777 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash 625501225, now seen corresponding path program 1 times [2021-12-06 18:58:01,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:01,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177204893] [2021-12-06 18:58:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:01,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:01,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:01,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177204893] [2021-12-06 18:58:01,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177204893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:58:01,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122749409] [2021-12-06 18:58:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:01,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:01,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:01,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:01,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:58:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 18:58:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:02,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 18:58:02,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 18:58:02,177 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-12-06 18:58:02,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 74 [2021-12-06 18:58:02,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 31 [2021-12-06 18:58:02,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2021-12-06 18:58:02,210 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 18:58:02,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-12-06 18:58:02,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2021-12-06 18:58:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:58:02,387 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-12-06 18:58:02,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 62 [2021-12-06 18:58:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2021-12-06 18:58:02,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:02,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:58:02,559 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 18:58:02,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 52 [2021-12-06 18:58:02,572 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:58:02,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 21 [2021-12-06 18:58:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:02,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:02,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122749409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:02,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:58:02,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-06 18:58:02,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980182526] [2021-12-06 18:58:02,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:02,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:58:02,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:58:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:58:02,811 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:03,244 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-12-06 18:58:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:58:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 18:58:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:03,245 INFO L225 Difference]: With dead ends: 64 [2021-12-06 18:58:03,245 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 18:58:03,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:58:03,246 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:03,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 219 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 187 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2021-12-06 18:58:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 18:58:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-12-06 18:58:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-06 18:58:03,251 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-12-06 18:58:03,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:03,251 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-06 18:58:03,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-06 18:58:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:58:03,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:03,252 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:03,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:58:03,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:03,454 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:03,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1157082046, now seen corresponding path program 1 times [2021-12-06 18:58:03,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:03,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318446211] [2021-12-06 18:58:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:03,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:03,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:03,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318446211] [2021-12-06 18:58:03,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318446211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:58:03,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427075225] [2021-12-06 18:58:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:03,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:03,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:03,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:58:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:03,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:58:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:03,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 22 treesize of output 26 [2021-12-06 18:58:03,756 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-12-06 18:58:03,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 64 [2021-12-06 18:58:03,778 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-12-06 18:58:03,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 46 [2021-12-06 18:58:03,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:03,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 18:58:03,829 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 18:58:03,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 18:58:03,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-12-06 18:58:03,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 18:58:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:03,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:03,950 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_670 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_670) |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|) 0))) is different from false [2021-12-06 18:58:03,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_23| Int) (v_ArrVal_670 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_23|) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_23| v_ArrVal_670) |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|) 0)))) is different from false [2021-12-06 18:58:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:03,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427075225] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:03,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:58:03,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-12-06 18:58:03,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559355958] [2021-12-06 18:58:03,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:03,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:58:03,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:03,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:58:03,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=83, Unknown=2, NotChecked=38, Total=156 [2021-12-06 18:58:03,993 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:04,229 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2021-12-06 18:58:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:58:04,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:58:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:04,231 INFO L225 Difference]: With dead ends: 126 [2021-12-06 18:58:04,231 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 18:58:04,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=183, Unknown=2, NotChecked=62, Total=342 [2021-12-06 18:58:04,232 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 242 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:04,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 245 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 174 Invalid, 0 Unknown, 166 Unchecked, 0.1s Time] [2021-12-06 18:58:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 18:58:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 62. [2021-12-06 18:58:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 61 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2021-12-06 18:58:04,243 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 16 [2021-12-06 18:58:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:04,243 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2021-12-06 18:58:04,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2021-12-06 18:58:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 18:58:04,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:04,244 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:04,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:58:04,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:04,446 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash 442135079, now seen corresponding path program 2 times [2021-12-06 18:58:04,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:04,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45995925] [2021-12-06 18:58:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:04,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:04,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:04,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45995925] [2021-12-06 18:58:04,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45995925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:58:04,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113607927] [2021-12-06 18:58:04,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:58:04,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:04,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:04,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:04,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:58:05,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:58:05,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:58:05,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 18:58:05,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:05,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:05,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:05,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:05,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 27 treesize of output 35 [2021-12-06 18:58:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:05,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:05,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 23 [2021-12-06 18:58:05,106 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-12-06 18:58:05,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 34 [2021-12-06 18:58:05,200 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:58:05,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 18:58:05,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:58:05,224 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-06 18:58:05,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2021-12-06 18:58:05,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:58:05,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-12-06 18:58:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:58:05,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:58:05,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113607927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:58:05,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:58:05,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-12-06 18:58:05,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703862656] [2021-12-06 18:58:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:58:05,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:58:05,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:05,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:58:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:58:05,332 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:05,553 INFO L93 Difference]: Finished difference Result 142 states and 176 transitions. [2021-12-06 18:58:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:58:05,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 18:58:05,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:05,554 INFO L225 Difference]: With dead ends: 142 [2021-12-06 18:58:05,554 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 18:58:05,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:58:05,556 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:05,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 131 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2021-12-06 18:58:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 18:58:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-12-06 18:58:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.25) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2021-12-06 18:58:05,565 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 18 [2021-12-06 18:58:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:05,565 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2021-12-06 18:58:05,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2021-12-06 18:58:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:58:05,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:05,566 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:05,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:58:05,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 18:58:05,770 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:05,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash -482453053, now seen corresponding path program 1 times [2021-12-06 18:58:05,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:05,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233000179] [2021-12-06 18:58:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:05,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:05,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:05,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233000179] [2021-12-06 18:58:05,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233000179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:58:05,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433771132] [2021-12-06 18:58:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:05,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:05,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:05,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:05,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:58:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:05,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 18:58:05,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:06,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 18:58:06,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:06,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 30 [2021-12-06 18:58:06,031 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-12-06 18:58:06,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 75 [2021-12-06 18:58:06,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:06,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 18:58:06,058 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-12-06 18:58:06,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 46 [2021-12-06 18:58:06,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2021-12-06 18:58:06,141 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:58:06,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 18:58:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:06,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 18:58:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:06,164 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:58:06,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 55 [2021-12-06 18:58:06,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:06,180 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-06 18:58:06,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2021-12-06 18:58:06,261 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:58:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 53 [2021-12-06 18:58:06,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 23 [2021-12-06 18:58:06,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 18:58:06,411 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:58:06,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 23 [2021-12-06 18:58:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:06,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:06,460 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1038 (Array Int Int)) (v_ArrVal_1037 (Array Int Int))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1038))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1037) |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|)) 0))) is different from false [2021-12-06 18:58:06,473 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1038 (Array Int Int)) (v_ArrVal_1037 (Array Int Int)) (|v_ULTIMATE.start_main_~item~0#1.base_25| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_25|) 0)) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~item~0#1.base_25| v_ArrVal_1038))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~item~0#1.base_25| v_ArrVal_1037) |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|)) 0)))) is different from false [2021-12-06 18:58:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:06,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433771132] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:06,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:58:06,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-12-06 18:58:06,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491972023] [2021-12-06 18:58:06,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:06,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:58:06,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:58:06,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=195, Unknown=2, NotChecked=58, Total=306 [2021-12-06 18:58:06,505 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:07,028 INFO L93 Difference]: Finished difference Result 142 states and 176 transitions. [2021-12-06 18:58:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:58:07,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:58:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:07,029 INFO L225 Difference]: With dead ends: 142 [2021-12-06 18:58:07,029 INFO L226 Difference]: Without dead ends: 140 [2021-12-06 18:58:07,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=500, Unknown=2, NotChecked=98, Total=756 [2021-12-06 18:58:07,030 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 210 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:07,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 250 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 296 Invalid, 0 Unknown, 211 Unchecked, 0.3s Time] [2021-12-06 18:58:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-06 18:58:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 95. [2021-12-06 18:58:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 94 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2021-12-06 18:58:07,038 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 19 [2021-12-06 18:58:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:07,038 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2021-12-06 18:58:07,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2021-12-06 18:58:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 18:58:07,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:07,039 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:07,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 18:58:07,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:07,240 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1136543444, now seen corresponding path program 2 times [2021-12-06 18:58:07,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:07,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744327082] [2021-12-06 18:58:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:07,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:07,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:07,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744327082] [2021-12-06 18:58:07,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744327082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:58:07,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772044142] [2021-12-06 18:58:07,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:58:07,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:07,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:07,433 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:07,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:58:07,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:58:07,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:58:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 18:58:07,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:07,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:07,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 38 [2021-12-06 18:58:07,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:07,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2021-12-06 18:58:07,724 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-12-06 18:58:07,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 83 [2021-12-06 18:58:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:07,744 INFO L354 Elim1Store]: treesize reduction 17, result has 34.6 percent of original size [2021-12-06 18:58:07,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 39 [2021-12-06 18:58:07,753 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:58:07,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 116 [2021-12-06 18:58:07,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2021-12-06 18:58:07,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 19 [2021-12-06 18:58:07,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 19 [2021-12-06 18:58:07,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 27 [2021-12-06 18:58:07,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 18:58:07,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 71 [2021-12-06 18:58:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:08,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:58:08,102 INFO L354 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2021-12-06 18:58:08,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 162 treesize of output 216 [2021-12-06 18:58:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:08,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:58:08,130 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-12-06 18:58:08,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 23 case distinctions, treesize of input 229 treesize of output 195 [2021-12-06 18:58:09,238 INFO L354 Elim1Store]: treesize reduction 340, result has 15.6 percent of original size [2021-12-06 18:58:09,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 245 treesize of output 247 [2021-12-06 18:58:09,301 INFO L354 Elim1Store]: treesize reduction 392, result has 12.7 percent of original size [2021-12-06 18:58:09,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 267 treesize of output 203 [2021-12-06 18:58:09,525 INFO L354 Elim1Store]: treesize reduction 49, result has 24.6 percent of original size [2021-12-06 18:58:09,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 130 treesize of output 78 [2021-12-06 18:58:09,533 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:58:09,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:58:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:09,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:14,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772044142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:14,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:58:14,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-06 18:58:14,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835662593] [2021-12-06 18:58:14,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:14,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:58:14,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:58:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2021-12-06 18:58:14,479 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:15,155 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2021-12-06 18:58:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:58:15,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 18:58:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:15,156 INFO L225 Difference]: With dead ends: 116 [2021-12-06 18:58:15,156 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 18:58:15,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=109, Invalid=592, Unknown=1, NotChecked=0, Total=702 [2021-12-06 18:58:15,158 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:15,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 349 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2021-12-06 18:58:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 18:58:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-06 18:58:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 104 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2021-12-06 18:58:15,169 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 20 [2021-12-06 18:58:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:15,169 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2021-12-06 18:58:15,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2021-12-06 18:58:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:58:15,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:15,170 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:15,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:58:15,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:15,372 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash 220535656, now seen corresponding path program 2 times [2021-12-06 18:58:15,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:15,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733237311] [2021-12-06 18:58:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:15,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:58:15,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:15,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733237311] [2021-12-06 18:58:15,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733237311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:58:15,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553902600] [2021-12-06 18:58:15,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:58:15,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:15,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:15,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:15,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:58:15,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:58:15,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:58:15,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 18:58:15,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:15,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:15,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2021-12-06 18:58:15,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:15,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2021-12-06 18:58:15,985 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-12-06 18:58:15,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 99 [2021-12-06 18:58:15,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 28 treesize of output 40 [2021-12-06 18:58:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:15,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:15,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 31 [2021-12-06 18:58:16,018 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-12-06 18:58:16,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 46 [2021-12-06 18:58:16,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2021-12-06 18:58:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-12-06 18:58:16,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:16,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2021-12-06 18:58:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 35 [2021-12-06 18:58:16,146 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-06 18:58:16,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2021-12-06 18:58:16,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2021-12-06 18:58:16,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 35 [2021-12-06 18:58:16,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-12-06 18:58:16,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-12-06 18:58:16,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-12-06 18:58:16,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 35 treesize of output 19 [2021-12-06 18:58:16,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-12-06 18:58:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:58:16,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:16,462 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1442 (Array Int Int)) (v_ArrVal_1441 (Array Int Int)) (|ULTIMATE.start_main_~item~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~item~0#1.base|) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|) 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1442) |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|)) (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1441) |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|))) 1)) is different from false [2021-12-06 18:58:16,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:58:16,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-12-06 18:58:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:58:16,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553902600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:16,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:58:16,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-12-06 18:58:16,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810555373] [2021-12-06 18:58:16,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:16,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:58:16,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:58:16,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=291, Unknown=1, NotChecked=34, Total=380 [2021-12-06 18:58:16,577 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:17,354 INFO L93 Difference]: Finished difference Result 185 states and 230 transitions. [2021-12-06 18:58:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:58:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 18:58:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:17,355 INFO L225 Difference]: With dead ends: 185 [2021-12-06 18:58:17,355 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 18:58:17,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=489, Unknown=1, NotChecked=46, Total=650 [2021-12-06 18:58:17,356 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 113 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:17,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 299 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 355 Invalid, 0 Unknown, 90 Unchecked, 0.6s Time] [2021-12-06 18:58:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 18:58:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 114. [2021-12-06 18:58:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 113 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2021-12-06 18:58:17,364 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 21 [2021-12-06 18:58:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:17,364 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2021-12-06 18:58:17,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:17,364 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2021-12-06 18:58:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:58:17,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:17,365 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:17,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:58:17,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:58:17,566 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash -800532698, now seen corresponding path program 1 times [2021-12-06 18:58:17,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:17,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562758106] [2021-12-06 18:58:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:17,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:17,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562758106] [2021-12-06 18:58:17,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562758106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:58:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131343119] [2021-12-06 18:58:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:17,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:17,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:17,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:17,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:58:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 18:58:17,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:17,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 18:58:17,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:17,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2021-12-06 18:58:17,895 INFO L354 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2021-12-06 18:58:17,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 81 [2021-12-06 18:58:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:17,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 31 [2021-12-06 18:58:17,923 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-12-06 18:58:17,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 46 [2021-12-06 18:58:17,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2021-12-06 18:58:17,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2021-12-06 18:58:17,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 46 [2021-12-06 18:58:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:18,010 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:58:18,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 67 [2021-12-06 18:58:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:18,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:18,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:18,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 30 [2021-12-06 18:58:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:18,032 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-12-06 18:58:18,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2021-12-06 18:58:18,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 18:58:18,104 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 18:58:18,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 65 [2021-12-06 18:58:18,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 18:58:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:58:18,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 30 [2021-12-06 18:58:18,399 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:58:18,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 55 [2021-12-06 18:58:18,407 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:58:18,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 18:58:18,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-12-06 18:58:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:18,538 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1637 (Array Int Int)) (|ULTIMATE.start_main_~item~0#1.offset| Int) (v_ArrVal_1638 (Array Int Int))) (= 2 (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1638)) (.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1637))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|)) (.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~bucket~0#1.base|) |c_ULTIMATE.start_main_~bucket~0#1.offset|))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~item~0#1.base|) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|) 2)) (select (select .cse0 .cse1) .cse2)) (+ 8 (select (select .cse3 .cse1) .cse2))))))) is different from false [2021-12-06 18:58:18,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:58:18,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 63 [2021-12-06 18:58:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:58:18,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131343119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:18,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:58:18,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-06 18:58:18,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110331420] [2021-12-06 18:58:18,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:18,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:58:18,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:58:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=402, Unknown=1, NotChecked=40, Total=506 [2021-12-06 18:58:18,669 INFO L87 Difference]: Start difference. First operand 114 states and 139 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:19,785 INFO L93 Difference]: Finished difference Result 275 states and 341 transitions. [2021-12-06 18:58:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:58:19,785 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 18:58:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:19,786 INFO L225 Difference]: With dead ends: 275 [2021-12-06 18:58:19,786 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 18:58:19,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=614, Unknown=1, NotChecked=52, Total=812 [2021-12-06 18:58:19,787 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 190 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:19,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 503 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 670 Invalid, 0 Unknown, 130 Unchecked, 0.9s Time] [2021-12-06 18:58:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 18:58:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 170. [2021-12-06 18:58:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 1.2738095238095237) internal successors, (214), 169 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 214 transitions. [2021-12-06 18:58:19,796 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 214 transitions. Word has length 21 [2021-12-06 18:58:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:19,797 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 214 transitions. [2021-12-06 18:58:19,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:58:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 214 transitions. [2021-12-06 18:58:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:58:19,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:19,798 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:19,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:58:19,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:19,999 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-12-06 18:58:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash -962615628, now seen corresponding path program 1 times [2021-12-06 18:58:20,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:20,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644827010] [2021-12-06 18:58:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:20,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:58:20,072 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 18:58:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:58:20,129 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 18:58:20,129 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 18:58:20,130 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2021-12-06 18:58:20,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2021-12-06 18:58:20,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2021-12-06 18:58:20,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2021-12-06 18:58:20,132 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2021-12-06 18:58:20,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:58:20,136 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 18:58:20,140 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 18:58:20,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 06:58:20 BoogieIcfgContainer [2021-12-06 18:58:20,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 18:58:20,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 18:58:20,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 18:58:20,173 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 18:58:20,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:58:00" (3/4) ... [2021-12-06 18:58:20,175 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 18:58:20,216 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 18:58:20,216 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 18:58:20,217 INFO L158 Benchmark]: Toolchain (without parser) took 20121.95ms. Allocated memory was 90.2MB in the beginning and 199.2MB in the end (delta: 109.1MB). Free memory was 59.5MB in the beginning and 163.9MB in the end (delta: -104.4MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. [2021-12-06 18:58:20,217 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 90.2MB. Free memory is still 59.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:58:20,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.01ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 41.5MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-06 18:58:20,218 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.69ms. Allocated memory is still 90.2MB. Free memory was 41.3MB in the beginning and 39.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:58:20,218 INFO L158 Benchmark]: Boogie Preprocessor took 23.79ms. Allocated memory is still 90.2MB. Free memory was 39.2MB in the beginning and 37.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:58:20,218 INFO L158 Benchmark]: RCFGBuilder took 425.00ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 37.3MB in the beginning and 93.1MB in the end (delta: -55.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-12-06 18:58:20,219 INFO L158 Benchmark]: TraceAbstraction took 19307.78ms. Allocated memory was 134.2MB in the beginning and 199.2MB in the end (delta: 65.0MB). Free memory was 93.0MB in the beginning and 167.0MB in the end (delta: -74.0MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. [2021-12-06 18:58:20,219 INFO L158 Benchmark]: Witness Printer took 42.99ms. Allocated memory is still 199.2MB. Free memory was 167.0MB in the beginning and 163.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:58:20,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 90.2MB. Free memory is still 59.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 283.01ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 41.5MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.69ms. Allocated memory is still 90.2MB. Free memory was 41.3MB in the beginning and 39.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.79ms. Allocated memory is still 90.2MB. Free memory was 39.2MB in the beginning and 37.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 425.00ms. Allocated memory was 90.2MB in the beginning and 134.2MB in the end (delta: 44.0MB). Free memory was 37.3MB in the beginning and 93.1MB in the end (delta: -55.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * TraceAbstraction took 19307.78ms. Allocated memory was 134.2MB in the beginning and 199.2MB in the end (delta: 65.0MB). Free memory was 93.0MB in the beginning and 167.0MB in the end (delta: -74.0MB). Peak memory consumption was 36.4MB. Max. memory is 16.1GB. * Witness Printer took 42.99ms. Allocated memory is still 199.2MB. Free memory was 167.0MB in the beginning and 163.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1061]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1004] BCK* bucket = malloc(sizeof(BCK)); [L1005] bucket->data = 0 [L1006] bucket->list = ((void*)0) [L1008] bucket->next = malloc(sizeof(BCK)) [L1009] EXPR bucket->next [L1009] BCK* bcki = bucket->next; [L1010] bcki->data = 1 [L1011] bcki->list = ((void*)0) [L1013] bcki->next = malloc(sizeof(BCK)) [L1014] EXPR bcki->next [L1014] bcki = bcki->next [L1015] bcki->data = 2 [L1016] bcki->list = ((void*)0) [L1017] bcki->next = ((void*)0) [L1019] struct TSLL* item = ((void*)0); [L1020] struct TSLL* itr = ((void*)0); VAL [bcki={-1:0}, bucket={-5:0}, item={0:0}, itr={0:0}] [L1021] COND TRUE __VERIFIER_nondet_int() [L1023] item = malloc(sizeof(SLL)) [L1024] item->next = ((void*)0) [L1025] COND TRUE __VERIFIER_nondet_int() [L1026] item->data = 0 VAL [bcki={-1:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1032] bcki = bucket VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1034] COND FALSE !(!(bcki != ((void*)0))) VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1035] COND FALSE !(!(item != ((void*)0))) VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1036] EXPR bcki->data [L1036] EXPR item->data VAL [bcki={-5:0}, bcki->data=0, bucket={-5:0}, item={-4:0}, item->data=0, itr={0:0}] [L1036] COND FALSE !(bcki->data != item->data) [L1038] COND FALSE !(!(bcki != ((void*)0))) VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1040] EXPR bcki->list VAL [bcki={-5:0}, bcki->list={0:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1040] COND TRUE bcki->list == ((void*)0) [L1041] bcki->list = item VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1021] COND FALSE !(__VERIFIER_nondet_int()) [L1052] bcki = bucket VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1053] COND TRUE bcki != ((void*)0) [L1055] EXPR bcki->list [L1055] item = bcki->list [L1056] bcki->list = ((void*)0) VAL [bcki={-5:0}, bucket={-5:0}, item={-4:0}, itr={0:0}] [L1057] COND TRUE item != ((void*)0) [L1059] itr = item [L1060] EXPR item->next [L1060] item = item->next [L1061] EXPR itr->data [L1061] EXPR bcki->data VAL [bcki={-5:0}, bcki->data=0, bucket={-5:0}, item={0:0}, itr={-4:0}, itr->data=0] [L1061] COND TRUE !(itr->data != bcki->data) [L1061] reach_error() VAL [bcki={-5:0}, bucket={-5:0}, item={0:0}, itr={-4:0}] - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1064]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 19.2s, OverallIterations: 12, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1024 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1024 mSDsluCounter, 2293 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 759 IncrementalHoareTripleChecker+Unchecked, 1904 mSDsCounter, 254 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1998 IncrementalHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 254 mSolverCounterUnsat, 389 mSDtfsCounter, 1998 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 357 GetRequests, 189 SyntacticMatches, 4 SemanticMatches, 164 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=11, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 292 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 321 NumberOfCodeBlocks, 321 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 385 ConstructedInterpolants, 51 QuantifiedInterpolants, 13635 SizeOfPredicates, 62 NumberOfNonLiveVariables, 1807 ConjunctsInSsa, 425 ConjunctsInUnsatCore, 24 InterpolantComputations, 5 PerfectInterpolantSequences, 55/141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-06 18:58:20,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6db988c3-0aa7-4d69-9e6e-2e9eaf312354/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE