./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 .......................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:17:25,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:17:25,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:17:25,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:17:25,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:17:25,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:17:25,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:17:25,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:17:25,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:17:25,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:17:25,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:17:25,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:17:25,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:17:25,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:17:25,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:17:25,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:17:25,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:17:25,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:17:25,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:17:25,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:17:25,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:17:25,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:17:25,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:17:25,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:17:25,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:17:25,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:17:25,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:17:25,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:17:25,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:17:25,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:17:25,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:17:25,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:17:25,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:17:25,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:17:25,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:17:25,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:17:25,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:17:25,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:17:25,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:17:25,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:17:25,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:17:25,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:17:25,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:17:25,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:17:25,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:17:25,564 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:17:25,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:17:25,564 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:17:25,565 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:17:25,565 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:17:25,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:17:25,573 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:17:25,575 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:17:25,575 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:17:25,576 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:17:25,576 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:17:25,576 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:17:25,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:17:25,578 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:17:25,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:17:25,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:17:25,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:17:25,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:17:25,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:17:25,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:17:25,580 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:17:25,580 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:17:25,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:17:25,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:17:25,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:17:25,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:17:25,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:17:25,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:17:25,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:17:25,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:17:25,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:17:25,585 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:17:25,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:17:25,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:17:25,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:17:25,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:17:25,587 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 [2021-10-16 02:17:25,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:17:25,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:17:25,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:17:25,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:17:25,940 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:17:25,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-fpi/ifeqn4f.c [2021-10-16 02:17:26,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data/8a9306791/b4df769e507f48f983bb5f1819059984/FLAGfadb91a34 [2021-10-16 02:17:26,591 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:17:26,592 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/sv-benchmarks/c/array-fpi/ifeqn4f.c [2021-10-16 02:17:26,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data/8a9306791/b4df769e507f48f983bb5f1819059984/FLAGfadb91a34 [2021-10-16 02:17:26,980 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data/8a9306791/b4df769e507f48f983bb5f1819059984 [2021-10-16 02:17:26,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:17:26,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:17:26,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:17:26,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:17:26,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:17:26,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:17:26" (1/1) ... [2021-10-16 02:17:26,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d0ced0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:26, skipping insertion in model container [2021-10-16 02:17:26,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:17:26" (1/1) ... [2021-10-16 02:17:27,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:17:27,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:17:27,204 WARN L228 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_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2021-10-16 02:17:27,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:17:27,241 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:17:27,252 WARN L228 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_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2021-10-16 02:17:27,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:17:27,277 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:17:27,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27 WrapperNode [2021-10-16 02:17:27,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:17:27,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:17:27,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:17:27,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:17:27,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:17:27,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:17:27,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:17:27,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:17:27,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:17:27,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:17:27,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:17:27,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:17:27,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (1/1) ... [2021-10-16 02:17:27,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:17:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:17:27,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:17:27,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:17:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:17:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:17:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:17:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:17:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:17:27,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:17:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:17:27,946 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:17:27,947 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-16 02:17:27,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:27 BoogieIcfgContainer [2021-10-16 02:17:27,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:17:27,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:17:27,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:17:27,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:17:27,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:17:26" (1/3) ... [2021-10-16 02:17:27,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72dd3732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:17:27, skipping insertion in model container [2021-10-16 02:17:27,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:27" (2/3) ... [2021-10-16 02:17:27,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72dd3732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:17:27, skipping insertion in model container [2021-10-16 02:17:27,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:27" (3/3) ... [2021-10-16 02:17:27,975 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2021-10-16 02:17:27,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:17:27,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:17:28,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:17:28,055 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-16 02:17:28,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:17:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:17:28,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:17:28,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:17:28,078 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:17:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:17:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2021-10-16 02:17:28,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:17:28,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136089704] [2021-10-16 02:17:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:28,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:17:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:28,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:17:28,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136089704] [2021-10-16 02:17:28,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136089704] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:17:28,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:17:28,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:17:28,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129284903] [2021-10-16 02:17:28,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:17:28,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:17:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:17:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:17:28,439 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:17:28,506 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-16 02:17:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:17:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:17:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:17:28,518 INFO L225 Difference]: With dead ends: 20 [2021-10-16 02:17:28,518 INFO L226 Difference]: Without dead ends: 10 [2021-10-16 02:17:28,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:17:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-16 02:17:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-16 02:17:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-16 02:17:28,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-16 02:17:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:17:28,563 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-16 02:17:28,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-16 02:17:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:17:28,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:17:28,565 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:17:28,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:17:28,567 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:17:28,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:17:28,572 INFO L82 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2021-10-16 02:17:28,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:17:28,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470560096] [2021-10-16 02:17:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:28,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:17:28,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:17:28,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167152010] [2021-10-16 02:17:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:28,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:17:28,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:17:28,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:17:28,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:17:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:28,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:17:28,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:17:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:17:28,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:17:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:17:28,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:17:28,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470560096] [2021-10-16 02:17:28,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:17:28,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167152010] [2021-10-16 02:17:28,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167152010] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:17:28,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:17:28,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-16 02:17:28,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378098764] [2021-10-16 02:17:28,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:17:28,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:17:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:17:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:17:28,964 INFO L87 Difference]: Start difference. First operand 10 states and 12 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) [2021-10-16 02:17:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:17:29,037 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-16 02:17:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:17:29,038 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 8 [2021-10-16 02:17:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:17:29,039 INFO L225 Difference]: With dead ends: 21 [2021-10-16 02:17:29,039 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 02:17:29,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:17:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 02:17:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-16 02:17:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-16 02:17:29,056 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-16 02:17:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:17:29,057 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-16 02:17:29,057 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) [2021-10-16 02:17:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-16 02:17:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:17:29,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:17:29,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:17:29,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:29,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-16 02:17:29,276 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:17:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:17:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2021-10-16 02:17:29,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:17:29,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177509614] [2021-10-16 02:17:29,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:29,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:17:29,317 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:17:29,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913706559] [2021-10-16 02:17:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:29,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:17:29,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:17:29,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:17:29,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:17:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:29,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:17:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:17:29,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:17:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:17:29,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:17:29,959 INFO L354 Elim1Store]: treesize reduction 150, result has 42.3 percent of original size [2021-10-16 02:17:29,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 74 treesize of output 143 [2021-10-16 02:17:30,273 INFO L354 Elim1Store]: treesize reduction 23, result has 54.9 percent of original size [2021-10-16 02:17:30,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 93 [2021-10-16 02:17:30,396 INFO L354 Elim1Store]: treesize reduction 48, result has 52.0 percent of original size [2021-10-16 02:17:30,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 75 [2021-10-16 02:17:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:17:30,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:17:30,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177509614] [2021-10-16 02:17:30,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:17:30,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913706559] [2021-10-16 02:17:30,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913706559] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:17:30,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212040011] [2021-10-16 02:17:30,606 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-16 02:17:30,607 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:17:30,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:17:30,633 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:17:30,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:17:30,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:30,676 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:17:30,677 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:30,678 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:17:30,681 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:17:30,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:30,683 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:17:30,688 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-16 02:17:30,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:30,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:30,786 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:17:30,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:17:30,789 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:30,793 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:17:30,794 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:30,795 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:17:30,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:17:30,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:17:30,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:30,866 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:30,870 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-10-16 02:17:30,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:17:30,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:108 [2021-10-16 02:17:30,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:31,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:17:31,097 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_17| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:17:31,101 INFO L168 Benchmark]: Toolchain (without parser) took 4114.91 ms. Allocated memory was 109.1 MB in the beginning and 155.2 MB in the end (delta: 46.1 MB). Free memory was 80.1 MB in the beginning and 99.4 MB in the end (delta: -19.4 MB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:31,102 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 109.1 MB. Free memory is still 65.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:17:31,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.98 ms. Allocated memory was 109.1 MB in the beginning and 155.2 MB in the end (delta: 46.1 MB). Free memory was 80.1 MB in the beginning and 129.8 MB in the end (delta: -49.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:31,103 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.30 ms. Allocated memory is still 155.2 MB. Free memory was 129.8 MB in the beginning and 128.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:31,104 INFO L168 Benchmark]: Boogie Preprocessor took 48.84 ms. Allocated memory is still 155.2 MB. Free memory was 128.1 MB in the beginning and 126.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:31,105 INFO L168 Benchmark]: RCFGBuilder took 551.32 ms. Allocated memory is still 155.2 MB. Free memory was 126.8 MB in the beginning and 111.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:31,105 INFO L168 Benchmark]: TraceAbstraction took 3148.18 ms. Allocated memory is still 155.2 MB. Free memory was 110.7 MB in the beginning and 99.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:31,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 109.1 MB. Free memory is still 65.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.98 ms. Allocated memory was 109.1 MB in the beginning and 155.2 MB in the end (delta: 46.1 MB). Free memory was 80.1 MB in the beginning and 129.8 MB in the end (delta: -49.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.30 ms. Allocated memory is still 155.2 MB. Free memory was 129.8 MB in the beginning and 128.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.84 ms. Allocated memory is still 155.2 MB. Free memory was 128.1 MB in the beginning and 126.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 551.32 ms. Allocated memory is still 155.2 MB. Free memory was 126.8 MB in the beginning and 111.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3148.18 ms. Allocated memory is still 155.2 MB. Free memory was 110.7 MB in the beginning and 99.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_17| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_17|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:17:31,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:17:33,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:17:33,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:17:33,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:17:33,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:17:33,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:17:33,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:17:33,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:17:33,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:17:33,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:17:33,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:17:33,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:17:33,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:17:33,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:17:33,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:17:33,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:17:33,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:17:33,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:17:33,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:17:33,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:17:33,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:17:33,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:17:33,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:17:33,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:17:33,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:17:33,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:17:33,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:17:33,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:17:33,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:17:33,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:17:33,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:17:33,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:17:33,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:17:33,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:17:33,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:17:33,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:17:33,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:17:33,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:17:33,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:17:33,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:17:33,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:17:33,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:17:34,033 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:17:34,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:17:34,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:17:34,035 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:17:34,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:17:34,036 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:17:34,036 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:17:34,036 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:17:34,037 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:17:34,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:17:34,040 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:17:34,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:17:34,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:17:34,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:17:34,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:17:34,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:17:34,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:17:34,041 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:17:34,041 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:17:34,042 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:17:34,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:17:34,042 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:17:34,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:17:34,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:17:34,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:17:34,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:17:34,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:17:34,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:17:34,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:17:34,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:17:34,044 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:17:34,044 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:17:34,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:17:34,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:17:34,046 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:17:34,046 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 [2021-10-16 02:17:34,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:17:34,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:17:34,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:17:34,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:17:34,557 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:17:34,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-fpi/ifeqn4f.c [2021-10-16 02:17:34,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data/28e18426b/9d5b83ec408446b8beb613f1ec8f0cdd/FLAG2a9c87980 [2021-10-16 02:17:35,203 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:17:35,205 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/sv-benchmarks/c/array-fpi/ifeqn4f.c [2021-10-16 02:17:35,216 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data/28e18426b/9d5b83ec408446b8beb613f1ec8f0cdd/FLAG2a9c87980 [2021-10-16 02:17:35,545 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/data/28e18426b/9d5b83ec408446b8beb613f1ec8f0cdd [2021-10-16 02:17:35,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:17:35,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:17:35,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:17:35,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:17:35,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:17:35,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8b8512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35, skipping insertion in model container [2021-10-16 02:17:35,561 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:17:35,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:17:35,750 WARN L228 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_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2021-10-16 02:17:35,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:17:35,792 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:17:35,830 WARN L228 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_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2021-10-16 02:17:35,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:17:35,881 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:17:35,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35 WrapperNode [2021-10-16 02:17:35,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:17:35,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:17:35,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:17:35,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:17:35,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:17:35,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:17:35,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:17:35,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:17:35,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:17:35,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:17:35,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:17:35,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:17:35,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (1/1) ... [2021-10-16 02:17:35,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:17:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:17:36,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:17:36,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:17:36,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:17:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:17:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-16 02:17:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:17:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:17:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:17:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-16 02:17:36,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:17:36,666 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-16 02:17:36,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:36 BoogieIcfgContainer [2021-10-16 02:17:36,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:17:36,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:17:36,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:17:36,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:17:36,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:17:35" (1/3) ... [2021-10-16 02:17:36,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f748d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:17:36, skipping insertion in model container [2021-10-16 02:17:36,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:17:35" (2/3) ... [2021-10-16 02:17:36,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f748d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:17:36, skipping insertion in model container [2021-10-16 02:17:36,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:36" (3/3) ... [2021-10-16 02:17:36,715 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2021-10-16 02:17:36,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:17:36,722 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:17:36,819 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:17:36,832 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-16 02:17:36,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:17:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:17:36,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:17:36,882 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:17:36,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:17:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:17:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-10-16 02:17:36,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:17:36,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726285249] [2021-10-16 02:17:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:36,909 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:17:36,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:17:36,916 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:17:36,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:17:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:17:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:17:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:37,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:17:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:37,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:17:37,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726285249] [2021-10-16 02:17:37,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726285249] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:17:37,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:17:37,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:17:37,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551926518] [2021-10-16 02:17:37,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:17:37,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:17:37,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:17:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:17:37,301 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:17:37,319 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-10-16 02:17:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:17:37,321 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:17:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:17:37,330 INFO L225 Difference]: With dead ends: 42 [2021-10-16 02:17:37,330 INFO L226 Difference]: Without dead ends: 19 [2021-10-16 02:17:37,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:17:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-16 02:17:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-16 02:17:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-16 02:17:37,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-10-16 02:17:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:17:37,391 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-16 02:17:37,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-16 02:17:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:17:37,393 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:17:37,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:17:37,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:37,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:17:37,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:17:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:17:37,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-10-16 02:17:37,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:17:37,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208952687] [2021-10-16 02:17:37,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:37,611 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:17:37,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:17:37,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:17:37,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:17:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:37,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:17:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:17:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:38,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:17:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:38,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:17:38,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208952687] [2021-10-16 02:17:38,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208952687] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:17:38,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:17:38,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:17:38,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100496641] [2021-10-16 02:17:38,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:17:38,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:17:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:17:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:17:38,283 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:17:38,659 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-10-16 02:17:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:17:38,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:17:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:17:38,661 INFO L225 Difference]: With dead ends: 45 [2021-10-16 02:17:38,661 INFO L226 Difference]: Without dead ends: 31 [2021-10-16 02:17:38,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:17:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-16 02:17:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-16 02:17:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-16 02:17:38,674 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-16 02:17:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:17:38,674 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-16 02:17:38,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-16 02:17:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:17:38,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:17:38,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:17:38,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-16 02:17:38,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:17:38,892 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:17:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:17:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-10-16 02:17:38,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:17:38,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081027758] [2021-10-16 02:17:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:38,895 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:17:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:17:38,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:17:38,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:17:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:39,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:17:39,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:17:39,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:39,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:39,198 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-16 02:17:39,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:39,399 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 1 case distinctions, treesize of input 57 treesize of output 33 [2021-10-16 02:17:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:17:39,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:17:39,779 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 22 [2021-10-16 02:17:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:17:39,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:17:39,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081027758] [2021-10-16 02:17:39,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081027758] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:17:39,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:17:39,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-16 02:17:39,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258135910] [2021-10-16 02:17:39,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:17:39,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:17:39,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:17:39,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:17:39,832 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:17:40,465 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-10-16 02:17:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:17:40,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-10-16 02:17:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:17:40,469 INFO L225 Difference]: With dead ends: 41 [2021-10-16 02:17:40,469 INFO L226 Difference]: Without dead ends: 39 [2021-10-16 02:17:40,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:17:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-16 02:17:40,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-10-16 02:17:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-16 02:17:40,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-16 02:17:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:17:40,477 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-16 02:17:40,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-16 02:17:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:17:40,478 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:17:40,478 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:17:40,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:40,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:17:40,679 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:17:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:17:40,679 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-10-16 02:17:40,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:17:40,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532042813] [2021-10-16 02:17:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:40,680 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:17:40,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:17:40,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:17:40,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:17:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:40,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:17:40,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:17:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:41,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:17:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:41,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:17:41,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532042813] [2021-10-16 02:17:41,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532042813] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:17:41,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [399523105] [2021-10-16 02:17:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:41,364 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:17:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:17:41,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:17:41,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 02:17:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:17:41,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:17:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:41,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:17:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:17:41,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [399523105] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:17:41,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:17:41,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 7] total 17 [2021-10-16 02:17:41,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542339521] [2021-10-16 02:17:41,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:17:41,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:17:41,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:17:41,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:17:41,835 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:17:42,145 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-10-16 02:17:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:17:42,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-16 02:17:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:17:42,147 INFO L225 Difference]: With dead ends: 75 [2021-10-16 02:17:42,147 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 02:17:42,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:17:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 02:17:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-10-16 02:17:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-16 02:17:42,154 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2021-10-16 02:17:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:17:42,155 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-16 02:17:42,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:17:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-16 02:17:42,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:17:42,156 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:17:42,157 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:17:42,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:42,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:42,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:17:42,565 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:17:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:17:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-10-16 02:17:42,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:17:42,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735635705] [2021-10-16 02:17:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:17:42,566 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:17:42,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:17:42,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:17:42,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:17:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:17:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:17:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:17:42,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:42,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:42,946 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-16 02:17:43,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:43,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:43,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:43,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:43,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:17:43,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:17:43,157 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-16 02:17:43,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2021-10-16 02:17:43,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:43,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 77 [2021-10-16 02:17:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:17:43,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:17:50,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:17:50,910 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20610 treesize of output 19082 [2021-10-16 02:17:54,725 INFO L354 Elim1Store]: treesize reduction 66, result has 35.9 percent of original size [2021-10-16 02:17:54,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 5141953 treesize of output 4373989 [2021-10-16 02:18:05,649 WARN L207 SmtUtils]: Spent 10.90 s on a formula simplification that was a NOOP. DAG size: 7332 [2021-10-16 02:18:05,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:05,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735635705] [2021-10-16 02:18:05,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:18:05,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1215875321] [2021-10-16 02:18:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:05,767 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:18:05,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:18:05,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:18:05,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 02:18:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:18:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:06,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,283 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-16 02:18:06,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:06,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:18:06,401 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-16 02:18:06,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2021-10-16 02:18:06,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:06,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 77 [2021-10-16 02:18:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:18:06,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:06,926 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:18:06,927 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 3270 treesize of output 1 [2021-10-16 02:18:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:18:06,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1215875321] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:18:06,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869270976] [2021-10-16 02:18:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:06,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:18:06,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:18:06,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:18:06,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:18:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:07,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:18:07,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,473 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-16 02:18:07,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:07,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:18:07,599 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-16 02:18:07,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2021-10-16 02:18:07,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:07,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 77 [2021-10-16 02:18:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:18:07,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:09,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:09,282 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20610 treesize of output 19082 [2021-10-16 02:18:12,064 INFO L354 Elim1Store]: treesize reduction 66, result has 35.9 percent of original size [2021-10-16 02:18:12,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9995714 treesize of output 8339558 [2021-10-16 02:18:30,523 WARN L207 SmtUtils]: Spent 18.44 s on a formula simplification that was a NOOP. DAG size: 7667 [2021-10-16 02:18:30,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:18:30,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-16 02:18:30,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-16 02:18:30,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138542716] [2021-10-16 02:18:30,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 02:18:30,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 02:18:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=216, Unknown=3, NotChecked=0, Total=272 [2021-10-16 02:18:30,600 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:51,177 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-10-16 02:18:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-16 02:18:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 02:18:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:51,182 INFO L225 Difference]: With dead ends: 116 [2021-10-16 02:18:51,182 INFO L226 Difference]: Without dead ends: 103 [2021-10-16 02:18:51,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 18097.4ms TimeCoverageRelationStatistics Valid=355, Invalid=1124, Unknown=3, NotChecked=0, Total=1482 [2021-10-16 02:18:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-16 02:18:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 40. [2021-10-16 02:18:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 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) [2021-10-16 02:18:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-10-16 02:18:51,194 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2021-10-16 02:18:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:51,195 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-10-16 02:18:51,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-10-16 02:18:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:18:51,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:51,196 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:51,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-16 02:18:51,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:51,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-16 02:18:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:18:51,821 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:18:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-10-16 02:18:51,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:51,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965273647] [2021-10-16 02:18:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:51,823 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:51,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:51,827 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:51,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:18:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:18:52,150 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:18:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:18:52,399 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:18:52,399 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:18:52,400 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:18:52,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:52,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:52,608 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:18:52,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:18:52 BoogieIcfgContainer [2021-10-16 02:18:52,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:18:52,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:18:52,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:18:52,669 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:18:52,669 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:17:36" (3/4) ... [2021-10-16 02:18:52,671 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:18:52,746 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa9baae-09ad-4199-bb34-2b0ff6f312cc/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:18:52,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:18:52,748 INFO L168 Benchmark]: Toolchain (without parser) took 77195.67 ms. Allocated memory was 60.8 MB in the beginning and 1.1 GB in the end (delta: 1.1 GB). Free memory was 38.8 MB in the beginning and 699.2 MB in the end (delta: -660.4 MB). Peak memory consumption was 411.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:52,748 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 60.8 MB. Free memory was 41.1 MB in the beginning and 41.1 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:18:52,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.63 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 43.6 MB in the end (delta: -4.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:52,749 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.86 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 42.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:18:52,750 INFO L168 Benchmark]: Boogie Preprocessor took 45.59 ms. Allocated memory is still 60.8 MB. Free memory was 42.1 MB in the beginning and 40.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:52,750 INFO L168 Benchmark]: RCFGBuilder took 692.93 ms. Allocated memory is still 60.8 MB. Free memory was 40.7 MB in the beginning and 29.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:52,751 INFO L168 Benchmark]: TraceAbstraction took 75997.15 ms. Allocated memory was 60.8 MB in the beginning and 1.1 GB in the end (delta: 1.1 GB). Free memory was 28.6 MB in the beginning and 702.3 MB in the end (delta: -673.8 MB). Peak memory consumption was 400.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:52,751 INFO L168 Benchmark]: Witness Printer took 78.81 ms. Allocated memory is still 1.1 GB. Free memory was 702.3 MB in the beginning and 699.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:52,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 60.8 MB. Free memory was 41.1 MB in the beginning and 41.1 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.63 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 43.6 MB in the end (delta: -4.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.86 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 42.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.59 ms. Allocated memory is still 60.8 MB. Free memory was 42.1 MB in the beginning and 40.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 692.93 ms. Allocated memory is still 60.8 MB. Free memory was 40.7 MB in the beginning and 29.0 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 75997.15 ms. Allocated memory was 60.8 MB in the beginning and 1.1 GB in the end (delta: 1.1 GB). Free memory was 28.6 MB in the beginning and 702.3 MB in the end (delta: -673.8 MB). Peak memory consumption was 400.0 MB. Max. memory is 16.1 GB. * Witness Printer took 78.81 ms. Allocated memory is still 1.1 GB. Free memory was 702.3 MB in the beginning and 699.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=2] [L31] COND TRUE i