./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8 --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 f11fd05631bc2e79be3808fcc8293f90c6238755 ..................................................................................................................................................................................................................................................................................................................................................................................................... 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_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8 --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 f11fd05631bc2e79be3808fcc8293f90c6238755 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:52:35,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:52:35,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:52:35,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:52:35,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:52:35,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:52:35,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:52:35,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:52:35,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:52:35,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:52:35,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:52:35,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:52:35,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:52:35,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:52:35,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:52:35,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:52:35,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:52:35,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:52:35,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:52:35,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:52:35,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:52:35,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:52:35,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:52:35,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:52:35,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:52:35,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:52:35,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:52:35,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:52:35,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:52:35,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:52:35,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:52:35,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:52:35,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:52:35,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:52:35,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:52:35,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:52:35,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:52:35,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:52:35,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:52:35,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:52:35,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:52:35,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:52:35,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:52:35,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:52:35,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:52:35,485 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:52:35,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:52:35,486 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:52:35,486 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:52:35,486 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:52:35,486 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:52:35,487 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:52:35,496 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:52:35,496 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:52:35,497 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:52:35,497 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:52:35,497 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:52:35,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:52:35,499 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:52:35,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:52:35,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:52:35,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:52:35,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:52:35,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:52:35,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:52:35,501 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:52:35,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:52:35,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:52:35,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:52:35,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:52:35,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:52:35,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:52:35,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:35,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:52:35,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:52:35,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:52:35,506 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:52:35,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:52:35,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:52:35,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:52:35,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:52:35,507 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_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f11fd05631bc2e79be3808fcc8293f90c6238755 [2021-10-13 06:52:35,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:52:35,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:52:35,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:52:35,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:52:35,870 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:52:35,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2021-10-13 06:52:35,968 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data/893e2f3a5/17f6dc725de84f20b8cd705f1d53b3b0/FLAGbe0472a37 [2021-10-13 06:52:36,703 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:52:36,704 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2021-10-13 06:52:36,720 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data/893e2f3a5/17f6dc725de84f20b8cd705f1d53b3b0/FLAGbe0472a37 [2021-10-13 06:52:36,944 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data/893e2f3a5/17f6dc725de84f20b8cd705f1d53b3b0 [2021-10-13 06:52:36,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:52:36,949 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:52:36,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:36,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:52:36,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:52:36,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:36" (1/1) ... [2021-10-13 06:52:36,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e75316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:36, skipping insertion in model container [2021-10-13 06:52:36,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:36" (1/1) ... [2021-10-13 06:52:36,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:52:37,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:52:37,417 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_211b0224-4f86-4936-8a15-ad8da840501e/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2021-10-13 06:52:37,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:37,437 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:52:37,534 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_211b0224-4f86-4936-8a15-ad8da840501e/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2021-10-13 06:52:37,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:37,587 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:52:37,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37 WrapperNode [2021-10-13 06:52:37,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:37,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:37,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:52:37,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:52:37,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,633 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:37,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:52:37,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:52:37,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:52:37,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:52:37,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:52:37,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:52:37,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:52:37,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (1/1) ... [2021-10-13 06:52:37,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:37,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:37,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:52:37,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:52:37,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:52:37,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:52:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:52:37,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:52:37,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:52:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:52:37,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:52:37,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:52:38,274 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:52:38,274 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-13 06:52:38,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:38 BoogieIcfgContainer [2021-10-13 06:52:38,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:52:38,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:52:38,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:52:38,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:52:38,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:52:36" (1/3) ... [2021-10-13 06:52:38,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1a8355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:38, skipping insertion in model container [2021-10-13 06:52:38,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:37" (2/3) ... [2021-10-13 06:52:38,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1a8355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:38, skipping insertion in model container [2021-10-13 06:52:38,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:38" (3/3) ... [2021-10-13 06:52:38,304 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2021-10-13 06:52:38,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:52:38,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:52:38,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:52:38,430 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 [2021-10-13 06:52:38,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:52:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 06:52:38,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:38,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:38,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2053014421, now seen corresponding path program 1 times [2021-10-13 06:52:38,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:38,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370897664] [2021-10-13 06:52:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:38,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:38,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:38,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370897664] [2021-10-13 06:52:38,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370897664] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:38,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:38,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:52:38,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552006384] [2021-10-13 06:52:38,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:52:38,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:52:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:52:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:52:38,751 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-13 06:52:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:38,774 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2021-10-13 06:52:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:52:38,777 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2021-10-13 06:52:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:38,787 INFO L225 Difference]: With dead ends: 25 [2021-10-13 06:52:38,788 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 06:52:38,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:52:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 06:52:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 06:52:38,839 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) [2021-10-13 06:52:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-13 06:52:38,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-13 06:52:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-13 06:52:38,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-13 06:52:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-13 06:52:38,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:52:38,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:38,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:38,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:52:38,844 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1050421157, now seen corresponding path program 1 times [2021-10-13 06:52:38,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:38,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833750774] [2021-10-13 06:52:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:38,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:39,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:39,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833750774] [2021-10-13 06:52:39,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833750774] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:39,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:39,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 06:52:39,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859389640] [2021-10-13 06:52:39,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:52:39,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:52:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:52:39,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:52:39,030 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:39,097 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-10-13 06:52:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:52:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 06:52:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:39,100 INFO L225 Difference]: With dead ends: 25 [2021-10-13 06:52:39,100 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 06:52:39,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:52:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 06:52:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-10-13 06:52:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-13 06:52:39,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-10-13 06:52:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:39,114 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-13 06:52:39,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-13 06:52:39,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 06:52:39,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:39,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:39,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 06:52:39,122 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:39,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1615469636, now seen corresponding path program 1 times [2021-10-13 06:52:39,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:39,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547768009] [2021-10-13 06:52:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:39,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:39,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:39,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547768009] [2021-10-13 06:52:39,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547768009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:52:39,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201986078] [2021-10-13 06:52:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:39,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:39,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:39,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:39,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:52:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:39,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:52:39,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:39,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:39,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201986078] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:39,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [661751893] [2021-10-13 06:52:39,660 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 06:52:39,661 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:52:39,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:52:39,675 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:52:39,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:52:39,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:39,731 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:52:39,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:39,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 06:52:39,744 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:52:39,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:39,746 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 06:52:39,750 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-13 06:52:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:39,839 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 06:52:39,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 06:52:39,851 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:39,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 06:52:39,857 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:39,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 06:52:39,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:52:39,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:52:39,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:39,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:39,904 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-10-13 06:52:39,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:52:39,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:77 [2021-10-13 06:52:39,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:40,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:40,134 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_11| 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) [2021-10-13 06:52:40,138 INFO L168 Benchmark]: Toolchain (without parser) took 3187.80 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 57.7 MB in the beginning and 63.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 25.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:40,138 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 90.2 MB. Free memory is still 48.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:52:40,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.34 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 57.5 MB in the beginning and 90.8 MB in the end (delta: -33.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:40,140 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.02 ms. Allocated memory is still 121.6 MB. Free memory was 90.8 MB in the beginning and 89.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:40,140 INFO L168 Benchmark]: Boogie Preprocessor took 60.85 ms. Allocated memory is still 121.6 MB. Free memory was 88.6 MB in the beginning and 87.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:40,141 INFO L168 Benchmark]: RCFGBuilder took 540.26 ms. Allocated memory is still 121.6 MB. Free memory was 87.6 MB in the beginning and 73.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:40,141 INFO L168 Benchmark]: TraceAbstraction took 1856.42 ms. Allocated memory is still 121.6 MB. Free memory was 72.9 MB in the beginning and 63.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:40,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 90.2 MB. Free memory is still 48.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 637.34 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 57.5 MB in the beginning and 90.8 MB in the end (delta: -33.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.02 ms. Allocated memory is still 121.6 MB. Free memory was 90.8 MB in the beginning and 89.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.85 ms. Allocated memory is still 121.6 MB. Free memory was 88.6 MB in the beginning and 87.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 540.26 ms. Allocated memory is still 121.6 MB. Free memory was 87.6 MB in the beginning and 73.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1856.42 ms. Allocated memory is still 121.6 MB. Free memory was 72.9 MB in the beginning and 63.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 11.3 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_11| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_11|: 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. [2021-10-13 06:52:40,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 06:52:43,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:52:43,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:52:43,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:52:43,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:52:43,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:52:43,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:52:43,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:52:43,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:52:43,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:52:43,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:52:43,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:52:43,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:52:43,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:52:43,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:52:43,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:52:43,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:52:43,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:52:43,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:52:43,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:52:43,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:52:43,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:52:43,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:52:43,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:52:43,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:52:43,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:52:43,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:52:43,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:52:43,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:52:43,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:52:43,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:52:43,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:52:43,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:52:43,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:52:43,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:52:43,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:52:43,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:52:43,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:52:43,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:52:43,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:52:43,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:52:43,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:52:43,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:52:43,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:52:43,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:52:43,477 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:52:43,477 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:52:43,478 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:52:43,478 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:52:43,478 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:52:43,479 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:52:43,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:52:43,482 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:52:43,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:52:43,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:52:43,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:52:43,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:52:43,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:52:43,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:52:43,485 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:52:43,485 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:52:43,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:52:43,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:52:43,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:52:43,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:52:43,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:52:43,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:52:43,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:52:43,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:43,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:52:43,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:52:43,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:52:43,488 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:52:43,489 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:52:43,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:52:43,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:52:43,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:52:43,491 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_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f11fd05631bc2e79be3808fcc8293f90c6238755 [2021-10-13 06:52:44,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:52:44,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:52:44,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:52:44,037 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:52:44,038 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:52:44,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2021-10-13 06:52:44,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data/9d6e52a0a/fd2def446b214061b3a54e492de22b4f/FLAG255fb82cd [2021-10-13 06:52:44,790 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:52:44,791 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2021-10-13 06:52:44,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data/9d6e52a0a/fd2def446b214061b3a54e492de22b4f/FLAG255fb82cd [2021-10-13 06:52:45,072 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/data/9d6e52a0a/fd2def446b214061b3a54e492de22b4f [2021-10-13 06:52:45,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:52:45,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:52:45,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:45,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:52:45,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:52:45,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187e04da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45, skipping insertion in model container [2021-10-13 06:52:45,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:52:45,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:52:45,635 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_211b0224-4f86-4936-8a15-ad8da840501e/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2021-10-13 06:52:45,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:45,659 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:52:45,751 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_211b0224-4f86-4936-8a15-ad8da840501e/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2021-10-13 06:52:45,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:45,816 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:52:45,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45 WrapperNode [2021-10-13 06:52:45,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:45,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:45,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:52:45,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:52:45,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:45,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:52:45,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:52:45,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:52:45,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:45,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:52:46,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:52:46,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:52:46,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:52:46,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (1/1) ... [2021-10-13 06:52:46,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:46,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:46,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:52:46,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:52:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:52:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 06:52:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:52:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 06:52:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:52:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:52:46,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:52:46,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:52:46,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:52:46,570 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-10-13 06:52:46,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:46 BoogieIcfgContainer [2021-10-13 06:52:46,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:52:46,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:52:46,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:52:46,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:52:46,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:52:45" (1/3) ... [2021-10-13 06:52:46,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372539d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:46, skipping insertion in model container [2021-10-13 06:52:46,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:45" (2/3) ... [2021-10-13 06:52:46,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372539d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:46, skipping insertion in model container [2021-10-13 06:52:46,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:46" (3/3) ... [2021-10-13 06:52:46,591 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2021-10-13 06:52:46,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:52:46,613 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:52:46,696 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:52:46,706 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 [2021-10-13 06:52:46,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:52:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 06:52:46,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:46,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:46,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:46,747 INFO L82 PathProgramCache]: Analyzing trace with hash -556870103, now seen corresponding path program 1 times [2021-10-13 06:52:46,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:46,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62441841] [2021-10-13 06:52:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:46,770 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:46,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:46,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:46,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:52:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 06:52:46,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:47,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:47,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:47,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62441841] [2021-10-13 06:52:47,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62441841] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:47,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:47,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:52:47,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48711183] [2021-10-13 06:52:47,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:52:47,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:52:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:52:47,149 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 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) [2021-10-13 06:52:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:47,173 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2021-10-13 06:52:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:52:47,174 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 [2021-10-13 06:52:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:47,185 INFO L225 Difference]: With dead ends: 39 [2021-10-13 06:52:47,185 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 06:52:47,189 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 [2021-10-13 06:52:47,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 06:52:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 06:52:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-13 06:52:47,227 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-10-13 06:52:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:47,228 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-13 06:52:47,229 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) [2021-10-13 06:52:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-13 06:52:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 06:52:47,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:47,230 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:47,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:47,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:52:47,457 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash 548273, now seen corresponding path program 1 times [2021-10-13 06:52:47,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:47,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47264616] [2021-10-13 06:52:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:47,465 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:47,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:47,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:52:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:47,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:52:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:47,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:47,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:47,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47264616] [2021-10-13 06:52:47,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47264616] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:47,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:47,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:52:47,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311942849] [2021-10-13 06:52:47,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:52:47,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:47,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:52:47,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:52:47,704 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:47,881 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-10-13 06:52:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 06:52:47,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 06:52:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:47,885 INFO L225 Difference]: With dead ends: 41 [2021-10-13 06:52:47,885 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 06:52:47,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 06:52:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 06:52:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2021-10-13 06:52:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-10-13 06:52:47,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2021-10-13 06:52:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:47,903 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-10-13 06:52:47,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-10-13 06:52:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 06:52:47,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:47,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:47,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:48,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:52:48,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1319805396, now seen corresponding path program 1 times [2021-10-13 06:52:48,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:48,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497312492] [2021-10-13 06:52:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:48,129 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:48,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:48,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:48,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:52:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:52:48,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:48,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:48,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:48,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497312492] [2021-10-13 06:52:48,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497312492] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:48,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2109857506] [2021-10-13 06:52:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:48,578 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:52:48,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:52:48,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:52:48,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 06:52:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:52:48,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:48,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:49,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2109857506] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:49,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 06:52:49,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 14 [2021-10-13 06:52:49,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392762174] [2021-10-13 06:52:49,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:52:49,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:49,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:52:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-13 06:52:49,011 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:49,236 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-10-13 06:52:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 06:52:49,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 06:52:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:49,238 INFO L225 Difference]: With dead ends: 30 [2021-10-13 06:52:49,238 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 06:52:49,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-13 06:52:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 06:52:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-10-13 06:52:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-10-13 06:52:49,247 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2021-10-13 06:52:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:49,247 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-10-13 06:52:49,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-10-13 06:52:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 06:52:49,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:49,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:49,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:49,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:49,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:52:49,676 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1984051427, now seen corresponding path program 1 times [2021-10-13 06:52:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:49,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879998881] [2021-10-13 06:52:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:49,678 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:49,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:49,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:49,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:52:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:49,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:52:49,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:49,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:50,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:50,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879998881] [2021-10-13 06:52:50,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879998881] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:50,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1400398287] [2021-10-13 06:52:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:50,170 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:52:50,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:52:50,182 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:52:50,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 06:52:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 06:52:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:50,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:50,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1400398287] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:50,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859242580] [2021-10-13 06:52:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:50,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:50,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:50,573 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:50,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 06:52:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:50,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:52:50,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:50,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:51,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859242580] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:51,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:52:51,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2021-10-13 06:52:51,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791971418] [2021-10-13 06:52:51,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 06:52:51,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:51,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 06:52:51,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-13 06:52:51,086 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:51,600 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-10-13 06:52:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 06:52:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 17 [2021-10-13 06:52:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:51,602 INFO L225 Difference]: With dead ends: 68 [2021-10-13 06:52:51,603 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 06:52:51,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-10-13 06:52:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 06:52:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 26. [2021-10-13 06:52:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-10-13 06:52:51,614 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-10-13 06:52:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-10-13 06:52:51,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-10-13 06:52:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 06:52:51,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:51,617 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:51,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:51,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:52,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:52,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:52:52,238 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:52,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:52,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1851518944, now seen corresponding path program 1 times [2021-10-13 06:52:52,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:52,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983833608] [2021-10-13 06:52:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:52,240 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:52,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:52,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:52,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:52:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:52,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 06:52:52,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:52,510 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 16 treesize of output 12 [2021-10-13 06:52:52,596 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 16 treesize of output 8 [2021-10-13 06:52:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:52,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:52,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:52,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983833608] [2021-10-13 06:52:52,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983833608] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591450448] [2021-10-13 06:52:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:52,700 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:52:52,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:52:52,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:52:52,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 06:52:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:52,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 06:52:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:53,048 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 16 treesize of output 12 [2021-10-13 06:52:53,178 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 16 treesize of output 8 [2021-10-13 06:52:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:53,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:53,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591450448] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:53,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468865244] [2021-10-13 06:52:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:53,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:53,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:53,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:53,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 06:52:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 06:52:53,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:53,540 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 16 treesize of output 12 [2021-10-13 06:52:53,574 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 16 treesize of output 8 [2021-10-13 06:52:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:53,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468865244] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:53,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:52:53,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 12 [2021-10-13 06:52:53,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290520953] [2021-10-13 06:52:53,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 06:52:53,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 06:52:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-13 06:52:53,645 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:53,979 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-10-13 06:52:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 06:52:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 06:52:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:53,982 INFO L225 Difference]: With dead ends: 38 [2021-10-13 06:52:53,982 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 06:52:53,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-10-13 06:52:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 06:52:53,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2021-10-13 06:52:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-10-13 06:52:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-13 06:52:53,999 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-10-13 06:52:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:53,999 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-13 06:52:54,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-13 06:52:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 06:52:54,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:54,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:54,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:54,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:54,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:54,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:54,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:54,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1614166673, now seen corresponding path program 2 times [2021-10-13 06:52:54,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:54,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258625553] [2021-10-13 06:52:54,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:52:54,631 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:54,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:54,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:54,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 06:52:54,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:52:54,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:52:54,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:52:54,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:52:55,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:52:55,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:55,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258625553] [2021-10-13 06:52:55,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258625553] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:55,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [513593355] [2021-10-13 06:52:55,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:52:55,199 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:52:55,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:52:55,200 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:52:55,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 06:52:55,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:52:55,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:52:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:52:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:52:55,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:52:55,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [513593355] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:55,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360323799] [2021-10-13 06:52:55,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:52:55,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:55,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:55,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 06:52:55,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:52:55,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:52:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:52:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:52:56,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:52:56,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360323799] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:56,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:52:56,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2021-10-13 06:52:56,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677552002] [2021-10-13 06:52:56,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 06:52:56,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 06:52:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-13 06:52:56,118 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:56,271 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-10-13 06:52:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 06:52:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 06:52:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:56,273 INFO L225 Difference]: With dead ends: 51 [2021-10-13 06:52:56,273 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 06:52:56,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-13 06:52:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 06:52:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2021-10-13 06:52:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-10-13 06:52:56,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 20 [2021-10-13 06:52:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:56,287 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-10-13 06:52:56,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:52:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-10-13 06:52:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 06:52:56,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:56,289 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:56,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:56,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:56,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-13 06:52:56,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:52:56,905 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1448786432, now seen corresponding path program 3 times [2021-10-13 06:52:56,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:56,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919300118] [2021-10-13 06:52:56,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:52:56,906 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:56,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:56,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:56,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 06:52:57,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 06:52:57,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:52:57,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 06:52:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:57,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:52:57,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:52:57,477 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 06:52:57,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 44 [2021-10-13 06:52:57,500 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 06:52:57,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-10-13 06:52:57,993 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 06:52:57,994 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 54 [2021-10-13 06:52:58,146 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-10-13 06:52:58,147 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 27 [2021-10-13 06:52:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:58,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:00,758 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_sll_create_~new_head~0.base (_ BitVec 32))) (let ((.cse2 (store |c_#memory_$Pointer$.base| ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_sll_create_~new_head~0.base) c_ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)))) (let ((.cse0 (select (select .cse2 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~new_head~0.base) c_ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (or (and (= (_ bv0 32) .cse0) (= .cse1 (_ bv0 32))) (not (= (select (select .cse2 .cse0) .cse1) (_ bv0 32))))))) is different from false [2021-10-13 06:53:02,946 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_sll_create_~new_head~0.base (_ BitVec 32))) (let ((.cse2 (store |c_#memory_$Pointer$.base| ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_sll_create_~new_head~0.base) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)))) (let ((.cse0 (select (select .cse2 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~new_head~0.base) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (or (and (= .cse0 (_ bv0 32)) (= (_ bv0 32) .cse1)) (not (= (select (select .cse2 .cse0) .cse1) (_ bv0 32))))))) is different from false [2021-10-13 06:53:03,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:53:03,013 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 927 treesize of output 839 [2021-10-13 06:53:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-10-13 06:53:03,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:53:03,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919300118] [2021-10-13 06:53:03,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919300118] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:03,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1225418440] [2021-10-13 06:53:03,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:53:03,901 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:53:03,903 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:53:03,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 06:53:04,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 06:53:04,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:53:04,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 06:53:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:04,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 06:53:04,586 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 [2021-10-13 06:53:04,599 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 [2021-10-13 06:53:04,743 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:53:04,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 06:53:04,933 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 06:53:04,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-13 06:53:04,961 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-13 06:53:04,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-13 06:53:05,612 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-13 06:53:05,613 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-10-13 06:53:05,637 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-10-13 06:53:05,637 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 23 [2021-10-13 06:53:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:05,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:08,402 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_35 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_35))))) (and (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_35 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_35) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)) (= (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_35 (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_35) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))))) is different from false [2021-10-13 06:53:08,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-10-13 06:53:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-13 06:53:09,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1225418440] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:09,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000327777] [2021-10-13 06:53:09,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:53:09,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:53:09,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:53:09,029 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:53:09,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 06:53:09,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 06:53:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:53:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 06:53:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:09,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 06:53:09,496 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 [2021-10-13 06:53:09,506 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 [2021-10-13 06:53:09,620 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:53:09,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-13 06:53:09,789 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 06:53:09,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-13 06:53:09,818 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 06:53:09,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-13 06:53:10,446 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 06:53:10,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-10-13 06:53:10,454 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 06:53:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 17 [2021-10-13 06:53:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:10,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:12,592 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (forall ((ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)))) is different from false [2021-10-13 06:53:53,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-10-13 06:53:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-13 06:53:53,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000327777] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:53,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:53:53,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 11, 11, 11] total 45 [2021-10-13 06:53:53,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347507387] [2021-10-13 06:53:53,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-13 06:53:53,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:53:53,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-13 06:53:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1496, Unknown=21, NotChecked=324, Total=1980 [2021-10-13 06:53:53,470 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 45 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:53:55,757 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base))) (let ((.cse1 (= c_ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32))) (.cse2 (not .cse0))) (and (or (and (= c_ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset) (= c_ULTIMATE.start_sll_create_~new_head~0.base c_ULTIMATE.start_sll_create_~head~0.base)) .cse0) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)) (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_35 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_35))))) (and (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_35 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_35) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)) (= (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_35 (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_35) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))))) (or .cse1 .cse2) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1))) .cse1 (= c_ULTIMATE.start_sll_create_~new_head~0.offset (_ bv0 32)) (forall ((ULTIMATE.start_sll_create_~new_head~0.base (_ BitVec 32))) (let ((.cse5 (store |c_#memory_$Pointer$.base| ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_sll_create_~new_head~0.base) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)))) (let ((.cse3 (select (select .cse5 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (.cse4 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~new_head~0.base) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (or (and (= .cse3 (_ bv0 32)) (= (_ bv0 32) .cse4)) (not (= (select (select .cse5 .cse3) .cse4) (_ bv0 32))))))) .cse2))) is different from false [2021-10-13 06:53:57,777 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)) (not (= c_ULTIMATE.start_sll_create_~new_head~0.base c_ULTIMATE.start_sll_create_~head~0.base)) (= c_ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32)) (forall ((ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))) (= c_ULTIMATE.start_sll_create_~new_head~0.offset (_ bv0 32)) (not (= (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) (forall ((ULTIMATE.start_sll_create_~new_head~0.base (_ BitVec 32))) (let ((.cse2 (store |c_#memory_$Pointer$.base| ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_sll_create_~new_head~0.base) c_ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)))) (let ((.cse0 (select (select .cse2 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_sll_create_~new_head~0.base) c_ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (or (and (= (_ bv0 32) .cse0) (= .cse1 (_ bv0 32))) (not (= (select (select .cse2 .cse0) .cse1) (_ bv0 32)))))))) is different from false [2021-10-13 06:53:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:53:59,223 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-13 06:53:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 06:53:59,224 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 45 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 06:53:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:53:59,225 INFO L225 Difference]: With dead ends: 73 [2021-10-13 06:53:59,225 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 06:53:59,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 56550.3ms TimeCoverageRelationStatistics Valid=229, Invalid=1934, Unknown=23, NotChecked=570, Total=2756 [2021-10-13 06:53:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 06:53:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-10-13 06:53:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:53:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-10-13 06:53:59,244 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 21 [2021-10-13 06:53:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:53:59,245 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-10-13 06:53:59,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 45 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:53:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-10-13 06:53:59,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 06:53:59,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:59,247 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:53:59,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:59,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:59,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-13 06:53:59,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:53:59,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:59,863 INFO L82 PathProgramCache]: Analyzing trace with hash -437096655, now seen corresponding path program 2 times [2021-10-13 06:53:59,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:59,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178297443] [2021-10-13 06:53:59,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:53:59,864 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:59,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:59,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:59,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 06:54:00,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:54:00,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:54:00,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:54:00,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:54:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:54:00,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:54:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:54:00,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:54:00,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178297443] [2021-10-13 06:54:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178297443] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:54:00,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [429201803] [2021-10-13 06:54:00,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:54:00,633 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:54:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:54:00,634 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:54:00,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 06:54:01,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:54:01,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:54:01,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:54:01,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:54:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:54:01,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:54:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:54:01,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [429201803] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:54:01,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953358832] [2021-10-13 06:54:01,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:54:01,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:54:01,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:54:01,274 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:54:01,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 06:54:01,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:54:01,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:54:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:54:01,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:54:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:54:01,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:54:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 06:54:02,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953358832] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:54:02,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:54:02,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 9] total 19 [2021-10-13 06:54:02,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594076998] [2021-10-13 06:54:02,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 06:54:02,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:54:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 06:54:02,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-13 06:54:02,190 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:54:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:54:04,066 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2021-10-13 06:54:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 06:54:04,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 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 22 [2021-10-13 06:54:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:54:04,069 INFO L225 Difference]: With dead ends: 127 [2021-10-13 06:54:04,069 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 06:54:04,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1797.2ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 06:54:04,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 06:54:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 59. [2021-10-13 06:54:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:54:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-13 06:54:04,088 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 22 [2021-10-13 06:54:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:54:04,089 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-13 06:54:04,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:54:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-13 06:54:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 06:54:04,090 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:54:04,091 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:54:04,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 06:54:04,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 06:54:04,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-13 06:54:04,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:54:04,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:54:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:54:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1605348276, now seen corresponding path program 3 times [2021-10-13 06:54:04,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:54:04,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766516733] [2021-10-13 06:54:04,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:54:04,695 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:54:04,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:54:04,697 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:54:04,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 06:54:05,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 06:54:05,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:54:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 06:54:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:54:05,160 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 16 treesize of output 12 [2021-10-13 06:54:05,311 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 06:54:05,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2021-10-13 06:54:05,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:54:05,513 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 38 treesize of output 30 [2021-10-13 06:54:05,602 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:54:05,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2021-10-13 06:54:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:54:05,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:54:07,889 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_50 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_50 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_50) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))) (= v_ULTIMATE.start_sll_create_~new_head~0.base_50 (_ bv0 32)))) is different from false [2021-10-13 06:54:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-10-13 06:54:07,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:54:07,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766516733] [2021-10-13 06:54:07,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766516733] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:54:07,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [336772000] [2021-10-13 06:54:07,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:54:07,965 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:54:07,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:54:07,978 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:54:08,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 06:54:08,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 06:54:08,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:54:08,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 06:54:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:54:08,559 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 16 treesize of output 12 [2021-10-13 06:54:08,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 06:54:08,678 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 06:54:08,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2021-10-13 06:54:08,788 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 38 treesize of output 30 [2021-10-13 06:54:08,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:54:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2021-10-13 06:54:08,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:54:08,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:54:10,956 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_53 (_ BitVec 32))) (or (= v_ULTIMATE.start_sll_create_~new_head~0.base_53 (_ bv0 32)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_53 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_53) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))))) is different from false [2021-10-13 06:54:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-10-13 06:54:11,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [336772000] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:54:11,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579331347] [2021-10-13 06:54:11,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:54:11,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:54:11,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:54:11,030 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:54:11,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 06:54:11,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 06:54:11,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:54:11,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 06:54:11,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:54:11,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 06:54:11,593 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 16 treesize of output 12 [2021-10-13 06:54:11,682 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:54:11,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 06:54:11,759 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 35 treesize of output 31 [2021-10-13 06:54:11,787 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 06:54:11,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-13 06:54:12,018 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 39 treesize of output 31 [2021-10-13 06:54:12,112 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 06:54:12,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-10-13 06:54:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:54:12,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:55:13,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-10-13 06:55:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:55:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579331347] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:55:13,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:55:13,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12, 11, 12, 12] total 29 [2021-10-13 06:55:13,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428660605] [2021-10-13 06:55:13,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 06:55:13,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:55:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 06:55:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=604, Unknown=30, NotChecked=102, Total=812 [2021-10-13 06:55:13,085 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:55:15,387 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_sll_create_~new_head~0.base)) (_ bv1 1))) (not (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1))) (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_50 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_50 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_50) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))) (= v_ULTIMATE.start_sll_create_~new_head~0.base_50 (_ bv0 32)))) (= c_ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32)) (= c_ULTIMATE.start_sll_create_~new_head~0.offset (_ bv0 32)) (not (= (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_53 (_ BitVec 32))) (or (= v_ULTIMATE.start_sll_create_~new_head~0.base_53 (_ bv0 32)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_53 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_53) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))))) (not (= c_ULTIMATE.start_sll_create_~new_head~0.base (_ bv0 32)))) is different from false [2021-10-13 06:55:17,448 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_sll_create_~new_head~0.base)) (_ bv1 1))) (not (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))) (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_56 (_ BitVec 32))) (or (forall ((ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_56 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_56) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_56))))))) (not (= c_ULTIMATE.start_sll_create_~new_head~0.base c_ULTIMATE.start_sll_create_~head~0.base)) (= c_ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32)) (= c_ULTIMATE.start_sll_create_~new_head~0.offset (_ bv0 32)) (not (= (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) (not (= c_ULTIMATE.start_sll_create_~new_head~0.base (_ bv0 32)))) is different from false [2021-10-13 06:55:19,462 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (.cse2 (select |c_#memory_$Pointer$.base| .cse0))) (and (not (= .cse0 (_ bv0 32))) (not (= .cse0 c_ULTIMATE.start_sll_create_~head~0.base)) (= .cse1 (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_sll_create_~head~0.base)))) (_ bv1 1))) (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_50 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_50 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_50) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32))) (= v_ULTIMATE.start_sll_create_~new_head~0.base_50 (_ bv0 32)))) (= c_ULTIMATE.start_sll_create_~head~0.offset (_ bv0 32)) (not (= (select .cse2 .cse1) (_ bv0 32))) (not (= (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) (not (= (select .cse2 (_ bv0 32)) (_ bv0 32))) (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_53 (_ BitVec 32))) (or (= v_ULTIMATE.start_sll_create_~new_head~0.base_53 (_ bv0 32)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_53 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_53) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset) (_ bv0 32)))))))) is different from false [2021-10-13 06:55:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:55:30,443 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2021-10-13 06:55:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 06:55:30,444 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2021-10-13 06:55:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:55:30,445 INFO L225 Difference]: With dead ends: 77 [2021-10-13 06:55:30,445 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 06:55:30,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 82510.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1004, Unknown=38, NotChecked=350, Total=1560 [2021-10-13 06:55:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 06:55:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 47. [2021-10-13 06:55:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:55:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-10-13 06:55:30,461 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 24 [2021-10-13 06:55:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:55:30,461 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-10-13 06:55:30,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:55:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-10-13 06:55:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 06:55:30,463 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:55:30,463 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:55:30,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 06:55:30,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-10-13 06:55:30,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 06:55:31,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:55:31,074 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:55:31,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:55:31,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1722156739, now seen corresponding path program 4 times [2021-10-13 06:55:31,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:55:31,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993350085] [2021-10-13 06:55:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 06:55:31,075 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:55:31,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:55:31,077 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:55:31,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 06:55:31,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 06:55:31,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:55:31,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:55:31,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:55:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:55:31,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:55:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:55:31,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:55:31,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993350085] [2021-10-13 06:55:31,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993350085] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:55:31,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [388732720] [2021-10-13 06:55:31,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 06:55:31,888 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:55:31,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:55:31,895 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:55:31,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-13 06:55:32,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 06:55:32,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:55:32,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:55:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:55:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:55:32,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:55:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 06:55:32,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [388732720] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:55:32,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171252925] [2021-10-13 06:55:32,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 06:55:32,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:55:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:55:32,662 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:55:32,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 06:55:33,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 06:55:33,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:55:33,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 06:55:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:55:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:55:33,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:55:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 06:55:33,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171252925] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:55:33,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:55:33,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 12] total 20 [2021-10-13 06:55:33,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509084878] [2021-10-13 06:55:33,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 06:55:33,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:55:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 06:55:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-10-13 06:55:33,547 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:55:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:55:34,385 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-10-13 06:55:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 06:55:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 06:55:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:55:34,386 INFO L225 Difference]: With dead ends: 101 [2021-10-13 06:55:34,387 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 06:55:34,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-10-13 06:55:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 06:55:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2021-10-13 06:55:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:55:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-10-13 06:55:34,413 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 25 [2021-10-13 06:55:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:55:34,414 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-10-13 06:55:34,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:55:34,414 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-10-13 06:55:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 06:55:34,416 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:55:34,416 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:55:34,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-10-13 06:55:34,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-13 06:55:34,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 06:55:35,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:55:35,020 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:55:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:55:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1795597100, now seen corresponding path program 5 times [2021-10-13 06:55:35,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:55:35,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799668984] [2021-10-13 06:55:35,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 06:55:35,021 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:55:35,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:55:35,022 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:55:35,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 06:55:35,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 06:55:35,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:55:35,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 06:55:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:55:35,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 06:55:35,767 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 [2021-10-13 06:55:35,778 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 [2021-10-13 06:55:35,888 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 06:55:35,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-13 06:55:36,047 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 06:55:36,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-10-13 06:55:36,081 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 06:55:36,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 56 [2021-10-13 06:55:36,209 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 06:55:36,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2021-10-13 06:55:36,444 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-10-13 06:55:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 65 [2021-10-13 06:55:36,495 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-10-13 06:55:36,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 91 [2021-10-13 06:55:37,283 INFO L354 Elim1Store]: treesize reduction 74, result has 3.9 percent of original size [2021-10-13 06:55:37,284 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 100 [2021-10-13 06:55:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:55:37,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:55:40,552 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_71 (_ BitVec 32))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_71 (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_71) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.offset))) (.cse0 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_71 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_71) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)))) (let ((.cse3 (select (select .cse0 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (.cse4 (select (select .cse5 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (let ((.cse2 (select (select .cse5 .cse3) .cse4)) (.cse1 (select (select .cse0 .cse3) .cse4))) (or (not (= (select (select .cse0 .cse1) .cse2) (_ bv0 32))) (= v_ULTIMATE.start_sll_create_~new_head~0.base_71 (_ bv0 32)) (and (= .cse2 (_ bv0 32)) (= (_ bv0 32) .cse1)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_71))))))))) is different from false [2021-10-13 06:55:43,014 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_71 (_ BitVec 32)) (ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (let ((.cse5 (let ((.cse7 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)))) (store .cse7 v_ULTIMATE.start_sll_create_~new_head~0.base_71 (store (select .cse7 v_ULTIMATE.start_sll_create_~new_head~0.base_71) (_ bv0 32) ULTIMATE.start_sll_create_~new_head~0.offset)))) (.cse0 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)))) (store .cse6 v_ULTIMATE.start_sll_create_~new_head~0.base_71 (store (select .cse6 v_ULTIMATE.start_sll_create_~new_head~0.base_71) (_ bv0 32) c_ULTIMATE.start_sll_create_~new_head~0.base))))) (let ((.cse3 (select (select .cse0 c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset)) (.cse4 (select (select .cse5 c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset))) (let ((.cse2 (select (select .cse5 .cse3) .cse4)) (.cse1 (select (select .cse0 .cse3) .cse4))) (or (not (= (select (select .cse0 .cse1) .cse2) (_ bv0 32))) (= v_ULTIMATE.start_sll_create_~new_head~0.base_71 (_ bv0 32)) (and (= .cse2 (_ bv0 32)) (= .cse1 (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_71))))))))) is different from false [2021-10-13 06:55:46,913 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_72 (_ BitVec 32)) (v_ULTIMATE.start_sll_create_~new_head~0.base_71 (_ BitVec 32)) (ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (let ((.cse3 (let ((.cse7 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_72 (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_72) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)))) (store .cse7 v_ULTIMATE.start_sll_create_~new_head~0.base_71 (store (select .cse7 v_ULTIMATE.start_sll_create_~new_head~0.base_71) (_ bv0 32) ULTIMATE.start_sll_create_~new_head~0.offset)))) (.cse0 (let ((.cse6 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_72 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_72) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)))) (store .cse6 v_ULTIMATE.start_sll_create_~new_head~0.base_71 (store (select .cse6 v_ULTIMATE.start_sll_create_~new_head~0.base_71) (_ bv0 32) v_ULTIMATE.start_sll_create_~new_head~0.base_72))))) (let ((.cse4 (select (select .cse0 v_ULTIMATE.start_sll_create_~new_head~0.base_72) ULTIMATE.start_sll_create_~new_head~0.offset)) (.cse5 (select (select .cse3 v_ULTIMATE.start_sll_create_~new_head~0.base_72) ULTIMATE.start_sll_create_~new_head~0.offset))) (let ((.cse1 (select (select .cse0 .cse4) .cse5)) (.cse2 (select (select .cse3 .cse4) .cse5))) (or (not (= (select (select .cse0 .cse1) .cse2) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_72))))) (= v_ULTIMATE.start_sll_create_~new_head~0.base_71 (_ bv0 32)) (and (= .cse1 (_ bv0 32)) (= .cse2 (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select (store |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_72 (_ bv1 1)) v_ULTIMATE.start_sll_create_~new_head~0.base_71))))))))) is different from false [2021-10-13 06:55:49,153 INFO L354 Elim1Store]: treesize reduction 5312, result has 25.8 percent of original size [2021-10-13 06:55:49,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 108387 treesize of output 93854 [2021-10-13 06:55:51,842 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-10-13 06:55:51,844 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 233804 treesize of output 228156 [2021-10-13 06:56:05,643 WARN L207 SmtUtils]: Spent 13.80 s on a formula simplification. DAG size of input: 1129 DAG size of output: 1116 [2021-10-13 07:00:56,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:56,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799668984] [2021-10-13 07:00:56,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:00:56,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [424960538] [2021-10-13 07:00:56,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 07:00:56,387 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:00:56,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:00:56,388 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:00:56,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-13 07:00:57,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 07:00:57,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:00:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 07:00:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:57,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:00:57,312 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 [2021-10-13 07:00:57,324 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 [2021-10-13 07:00:57,449 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:00:57,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-10-13 07:00:57,646 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:00:57,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2021-10-13 07:00:57,669 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 07:00:57,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 57 [2021-10-13 07:00:57,839 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 07:00:57,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-10-13 07:00:58,086 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 07:00:58,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 66 [2021-10-13 07:00:58,129 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-10-13 07:00:58,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 91 [2021-10-13 07:00:59,134 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-10-13 07:00:59,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 85 [2021-10-13 07:00:59,186 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-10-13 07:00:59,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 40 [2021-10-13 07:00:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:00:59,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:02,219 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_73 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_73))))))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_73 (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_sll_create_~new_head~0.base_73) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.offset))) (.cse3 (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_73 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_sll_create_~new_head~0.base_73) (_ bv0 32) c_ULTIMATE.start_sll_create_~head~0.base)))) (let ((.cse1 (select (select .cse3 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (.cse2 (select (select .cse0 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (and (= (select (select .cse0 .cse1) .cse2) (_ bv0 32)) (= (select (select .cse3 .cse1) .cse2) (_ bv0 32))))))) is different from false [2021-10-13 07:01:04,312 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_sll_create_~new_head~0.base_73 (_ BitVec 32))) (or (let ((.cse0 (let ((.cse5 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base) c_ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)))) (store .cse5 v_ULTIMATE.start_sll_create_~new_head~0.base_73 (store (select .cse5 v_ULTIMATE.start_sll_create_~new_head~0.base_73) (_ bv0 32) c_ULTIMATE.start_sll_create_~new_head~0.offset)))) (.cse3 (let ((.cse4 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base) c_ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)))) (store .cse4 v_ULTIMATE.start_sll_create_~new_head~0.base_73 (store (select .cse4 v_ULTIMATE.start_sll_create_~new_head~0.base_73) (_ bv0 32) c_ULTIMATE.start_sll_create_~new_head~0.base))))) (let ((.cse1 (select (select .cse3 c_ULTIMATE.start_sll_create_~new_head~0.base) c_ULTIMATE.start_sll_create_~new_head~0.offset)) (.cse2 (select (select .cse0 c_ULTIMATE.start_sll_create_~new_head~0.base) c_ULTIMATE.start_sll_create_~new_head~0.offset))) (and (= (_ bv0 32) (select (select .cse0 .cse1) .cse2)) (= (_ bv0 32) (select (select .cse3 .cse1) .cse2))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_sll_create_~new_head~0.base_73))))))))) is different from false [2021-10-13 07:01:08,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:01:08,967 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 9389 treesize of output 8885 [2021-10-13 07:01:09,076 INFO L354 Elim1Store]: treesize reduction 11, result has 60.7 percent of original size [2021-10-13 07:01:09,077 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 4547 treesize of output 4491 [2021-10-13 07:01:09,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:01:09,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716748347] [2021-10-13 07:01:09,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 07:01:09,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:01:09,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:01:09,354 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:01:09,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 07:01:09,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 07:01:09,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:01:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 07:01:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:01:09,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:01:10,007 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 [2021-10-13 07:01:10,019 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 [2021-10-13 07:01:10,060 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:01:10,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-13 07:01:10,349 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:01:10,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 59 [2021-10-13 07:01:10,373 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 07:01:10,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 56 [2021-10-13 07:01:10,642 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-13 07:01:10,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 46 [2021-10-13 07:01:10,974 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-13 07:01:10,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 74 [2021-10-13 07:01:11,037 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-10-13 07:01:11,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 67 [2021-10-13 07:01:12,186 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-13 07:01:12,187 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 66 [2021-10-13 07:01:12,194 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:01:12,194 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2021-10-13 07:01:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:01:12,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:01:14,339 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (select (select .cse0 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (_ bv0 32))) (forall ((ULTIMATE.start_sll_create_~new_head~0.offset (_ BitVec 32))) (= (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.base)))) (select .cse1 (select (select .cse1 c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_sll_create_~new_head~0.base) ULTIMATE.start_sll_create_~new_head~0.offset c_ULTIMATE.start_sll_create_~head~0.offset)) c_ULTIMATE.start_sll_create_~head~0.base) c_ULTIMATE.start_sll_create_~head~0.offset)) (_ bv0 32)))) is different from false [2021-10-13 07:02:54,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:02:54,552 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 6355 treesize of output 5851 [2021-10-13 07:02:54,868 INFO L354 Elim1Store]: treesize reduction 11, result has 60.7 percent of original size [2021-10-13 07:02:54,869 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 3726 treesize of output 3722 [2021-10-13 07:02:55,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:02:55,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:02:55,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:02:55,192 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:02:55,192 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:02:55,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:02:55,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:02:55,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-13 07:02:55,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:02:55,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:02:55,812 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:02:55,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:02:55 BoogieIcfgContainer [2021-10-13 07:02:55,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:02:55,842 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:02:55,842 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:02:55,843 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:02:55,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:46" (3/4) ... [2021-10-13 07:02:55,848 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:02:55,849 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:02:55,850 INFO L168 Benchmark]: Toolchain (without parser) took 610772.55 ms. Allocated memory was 50.3 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 24.8 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 51.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:02:55,851 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 50.3 MB. Free memory was 29.6 MB in the beginning and 29.5 MB in the end (delta: 40.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:02:55,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 739.28 ms. Allocated memory was 50.3 MB in the beginning and 71.3 MB in the end (delta: 21.0 MB). Free memory was 24.6 MB in the beginning and 46.2 MB in the end (delta: -21.6 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:02:55,853 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.05 ms. Allocated memory is still 71.3 MB. Free memory was 46.2 MB in the beginning and 44.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:02:55,855 INFO L168 Benchmark]: Boogie Preprocessor took 93.07 ms. Allocated memory is still 71.3 MB. Free memory was 44.2 MB in the beginning and 42.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:02:55,855 INFO L168 Benchmark]: RCFGBuilder took 570.90 ms. Allocated memory is still 71.3 MB. Free memory was 42.5 MB in the beginning and 49.7 MB in the end (delta: -7.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:02:55,855 INFO L168 Benchmark]: TraceAbstraction took 609266.84 ms. Allocated memory was 71.3 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 49.4 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-10-13 07:02:55,856 INFO L168 Benchmark]: Witness Printer took 6.50 ms. Allocated memory is still 1.9 GB. Free memory is still 1.8 GB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:02:55,858 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 50.3 MB. Free memory was 29.6 MB in the beginning and 29.5 MB in the end (delta: 40.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 739.28 ms. Allocated memory was 50.3 MB in the beginning and 71.3 MB in the end (delta: 21.0 MB). Free memory was 24.6 MB in the beginning and 46.2 MB in the end (delta: -21.6 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.05 ms. Allocated memory is still 71.3 MB. Free memory was 46.2 MB in the beginning and 44.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 93.07 ms. Allocated memory is still 71.3 MB. Free memory was 44.2 MB in the beginning and 42.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 570.90 ms. Allocated memory is still 71.3 MB. Free memory was 42.5 MB in the beginning and 49.7 MB in the end (delta: -7.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 609266.84 ms. Allocated memory was 71.3 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 49.4 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. * Witness Printer took 6.50 ms. Allocated memory is still 1.9 GB. Free memory is still 1.8 GB. There was no memory consumed. 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 - UnprovableResult [Line: 613]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L603] int len = 2; [L604] COND TRUE len < 32 && __VERIFIER_nondet_int() [L605] len++ [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L575] SLL head = ((void *)0); [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND FALSE !(len > 0) [L585] return head; [L607] SLL s = sll_create(len); [L588] int len = 0; [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND FALSE !(\read(head)) [L593] return len; [L608] COND TRUE len != sll_length(s) [L613] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 609116.5ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 32.7ms, AutomataDifference: 27330.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 176 SDtfs, 725 SDslu, 1025 SDs, 0 SdLazy, 1064 SolverSat, 188 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2373.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1026 GetRequests, 796 SyntacticMatches, 1 SemanticMatches, 229 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 142778.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=10, InterpolantAutomatonStates: 120, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 155.4ms AutomataMinimizationTime, 10 MinimizatonAttempts, 176 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 331.8ms SsaConstructionTime, 1153.7ms SatisfiabilityAnalysisTime, 128325.1ms InterpolantComputationTime, 500 NumberOfCodeBlocks, 500 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 950 ConstructedInterpolants, 25 QuantifiedInterpolants, 5678 SizeOfPredicates, 185 NumberOfNonLiveVariables, 1876 ConjunctsInSsa, 310 ConjunctsInUnsatCore, 50 InterpolantComputations, 6 PerfectInterpolantSequences, 181/452 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:02:56,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_211b0224-4f86-4936-8a15-ad8da840501e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...