./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI --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 fceaf8568616da2f46609328370427e58ff9204a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI --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 fceaf8568616da2f46609328370427e58ff9204a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:29:03,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:03,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:03,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:03,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:03,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:03,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:03,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:03,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:03,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:03,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:03,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:03,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:03,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:03,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:03,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:03,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:03,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:03,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:03,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:03,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:03,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:03,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:03,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:03,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:03,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:03,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:03,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:03,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:03,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:03,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:03,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:03,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:03,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:03,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:03,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:03,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:03,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:03,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:03,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:03,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:03,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:29:03,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:03,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:03,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:03,434 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:03,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:03,435 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:03,435 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:03,435 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:03,435 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:03,436 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:03,436 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:03,436 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:03,436 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:03,437 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:03,437 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:03,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:03,438 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:03,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:03,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:03,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:03,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:03,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:03,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:03,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:03,439 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:03,440 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:03,440 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:03,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:03,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:03,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:03,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:03,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:03,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:03,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:03,441 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:03,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:03,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:03,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:03,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:03,442 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_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fceaf8568616da2f46609328370427e58ff9204a [2021-10-11 02:29:03,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:03,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:03,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:03,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:03,738 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:03,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/ifeqn1.c [2021-10-11 02:29:03,817 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data/9e1fd212e/df1ae311696c43e0b09534a733d16fba/FLAG12e6e9888 [2021-10-11 02:29:04,247 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:04,248 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/sv-benchmarks/c/array-fpi/ifeqn1.c [2021-10-11 02:29:04,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data/9e1fd212e/df1ae311696c43e0b09534a733d16fba/FLAG12e6e9888 [2021-10-11 02:29:04,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data/9e1fd212e/df1ae311696c43e0b09534a733d16fba [2021-10-11 02:29:04,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:04,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:04,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:04,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:04,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:04,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc994c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04, skipping insertion in model container [2021-10-11 02:29:04,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:04,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:04,861 WARN L226 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_b3bc74fc-9847-452f-a4c6-c6631014da69/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-10-11 02:29:04,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:04,893 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:04,906 WARN L226 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_b3bc74fc-9847-452f-a4c6-c6631014da69/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-10-11 02:29:04,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:04,930 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:04,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04 WrapperNode [2021-10-11 02:29:04,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:04,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:04,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:04,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:04,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:04,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:04,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:04,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:04,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:04,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:05,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:05,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:05,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:05,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:05,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... [2021-10-11 02:29:05,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:05,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:05,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:05,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:05,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:29:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:29:05,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:29:05,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:05,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:05,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:29:05,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:05,718 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:29:05,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:05 BoogieIcfgContainer [2021-10-11 02:29:05,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:05,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:05,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:05,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:05,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:04" (1/3) ... [2021-10-11 02:29:05,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c3fcaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:05, skipping insertion in model container [2021-10-11 02:29:05,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:04" (2/3) ... [2021-10-11 02:29:05,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58c3fcaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:05, skipping insertion in model container [2021-10-11 02:29:05,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:05" (3/3) ... [2021-10-11 02:29:05,731 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn1.c [2021-10-11 02:29:05,746 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:05,750 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:05,763 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:05,787 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:05,788 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:05,788 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:05,788 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:05,788 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:05,788 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:05,789 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:05,789 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:05,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:29:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:29:05,806 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:05,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:05,808 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:05,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2021-10-11 02:29:05,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:05,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103320758] [2021-10-11 02:29:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:05,926 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:05,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073757339] [2021-10-11 02:29:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:06,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:29:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:06,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:06,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103320758] [2021-10-11 02:29:06,193 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:06,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073757339] [2021-10-11 02:29:06,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:06,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-11 02:29:06,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341380720] [2021-10-11 02:29:06,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:29:06,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:06,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:29:06,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:06,213 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2021-10-11 02:29:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:06,270 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-11 02:29:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:29:06,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:29:06,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:06,280 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:29:06,280 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:29:06,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:29:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:29:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:29:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:29:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-11 02:29:06,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-11 02:29:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:06,315 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-11 02:29:06,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:29:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-11 02:29:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:29:06,316 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:06,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:06,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-11 02:29:06,531 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:06,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2021-10-11 02:29:06,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:06,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467030154] [2021-10-11 02:29:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:06,570 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:06,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804311038] [2021-10-11 02:29:06,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:06,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:29:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:29:06,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:29:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467030154] [2021-10-11 02:29:06,753 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:06,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804311038] [2021-10-11 02:29:06,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:06,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-11 02:29:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959674658] [2021-10-11 02:29:06,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:29:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:29:06,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:06,757 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2021-10-11 02:29:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:06,814 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:29:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:29:06,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:29:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:06,815 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:29:06,816 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:29:06,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:29:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:29:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-11 02:29:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:29:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:29:06,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:29:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:06,821 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:29:06,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:29:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:29:06,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:29:06,822 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:06,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:07,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:07,047 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2021-10-11 02:29:07,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:07,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794793236] [2021-10-11 02:29:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:07,089 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:07,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845635639] [2021-10-11 02:29:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:07,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 02:29:07,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:07,279 INFO L382 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 [2021-10-11 02:29:07,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:29:07,282 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:29:07,283 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:29:07,283 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-10-11 02:29:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:07,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:07,384 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2021-10-11 02:29:07,385 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:29:07,457 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:29:07,459 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:29:07,461 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:29:07,471 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:29:07,516 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:29:07,516 INFO L382 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 44 treesize of output 47 [2021-10-11 02:29:07,518 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:29:07,525 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_2], 2=[v_arrayElimCell_1]} [2021-10-11 02:29:07,549 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296)) (.cse14 (mod c_ULTIMATE.start_main_~i~0 4294967296))) (let ((.cse1 (<= .cse14 2147483647)) (.cse7 (<= .cse13 2147483647)) (.cse0 (= c_ULTIMATE.start_main_~i~0 0)) (.cse10 (< 2147483647 .cse14)) (.cse2 (< 2147483647 .cse13))) (and (or .cse0 .cse1 .cse2 (forall ((v_prenex_6 Int) (v_prenex_7 Int) (v_prenex_10 Int) (v_prenex_8 (Array Int (Array Int Int))) (v_prenex_9 Int)) (= (select (let ((.cse3 (select v_prenex_8 v_prenex_6))) (store .cse3 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_10 (- 34359738368)) (let ((.cse4 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_8 v_prenex_7) (+ .cse4 v_prenex_9)) (select .cse3 (+ .cse4 v_prenex_10)))))) v_prenex_10) 1))) (or .cse0 .cse1 (forall ((v_prenex_15 Int) (v_prenex_12 Int) (v_prenex_13 (Array Int (Array Int Int))) (v_prenex_11 Int) (v_prenex_14 Int)) (= (select (let ((.cse5 (select v_prenex_13 v_prenex_11))) (store .cse5 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_15 (- 34359738368)) (let ((.cse6 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse5 (+ v_prenex_15 .cse6 (- 34359738368))) (select (select v_prenex_13 v_prenex_12) (+ v_prenex_14 .cse6 (- 34359738368))))))) v_prenex_15) 1)) .cse7) (or .cse0 (forall ((ULTIMATE.start_main_~b~0.base Int) (ULTIMATE.start_main_~a~0.base Int) (|#memory_int| (Array Int (Array Int Int))) (ULTIMATE.start_main_~a~0.offset Int) (ULTIMATE.start_main_~b~0.offset Int)) (= (select (let ((.cse8 (select |#memory_int| ULTIMATE.start_main_~b~0.base))) (store .cse8 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) ULTIMATE.start_main_~b~0.offset) (let ((.cse9 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse8 (+ .cse9 ULTIMATE.start_main_~b~0.offset (- 34359738368))) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset .cse9 (- 34359738368))))))) ULTIMATE.start_main_~b~0.offset) 1)) .cse10 .cse7) (or (forall ((v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 (Array Int (Array Int Int))) (v_prenex_1 Int)) (= (select (let ((.cse11 (select v_prenex_3 v_prenex_1))) (store .cse11 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_5) (let ((.cse12 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_3 v_prenex_2) (+ v_prenex_4 .cse12)) (select .cse11 (+ v_prenex_5 .cse12)))))) v_prenex_5) 1)) .cse0 .cse10 .cse2)))) is different from false [2021-10-11 02:29:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-10-11 02:29:07,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794793236] [2021-10-11 02:29:07,572 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:07,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845635639] [2021-10-11 02:29:07,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087234997] [2021-10-11 02:29:07,597 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:29:07,597 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:07,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:07,614 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:07,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:07,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:08,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:08,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:08,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:08,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:08,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:08,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:08,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:09,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:09,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:09,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:09,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:09,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:09,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:09,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:09,470 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:29:09,674 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-10-11 02:29:09,848 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:29:10,037 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:29:10,381 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-10-11 02:29:10,385 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:10,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:29:10,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-10-11 02:29:10,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797390398] [2021-10-11 02:29:10,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:29:10,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:29:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=164, Unknown=1, NotChecked=26, Total=240 [2021-10-11 02:29:10,392 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2021-10-11 02:29:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:10,828 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-11 02:29:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 02:29:10,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2021-10-11 02:29:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:10,830 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:29:10,830 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:29:10,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=132, Invalid=471, Unknown=1, NotChecked=46, Total=650 [2021-10-11 02:29:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:29:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 14. [2021-10-11 02:29:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:29:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-11 02:29:10,836 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-10-11 02:29:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:10,837 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-11 02:29:10,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:29:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-11 02:29:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:29:10,838 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:10,838 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:11,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:11,063 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:11,064 INFO L82 PathProgramCache]: Analyzing trace with hash 252084121, now seen corresponding path program 2 times [2021-10-11 02:29:11,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:11,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132582410] [2021-10-11 02:29:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:11,092 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:11,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489370146] [2021-10-11 02:29:11,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:11,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:29:11,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:29:11,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:29:11,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:11,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:11,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132582410] [2021-10-11 02:29:11,270 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:11,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489370146] [2021-10-11 02:29:11,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896559323] [2021-10-11 02:29:11,276 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:29:11,276 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:11,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:11,277 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:11,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:11,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:11,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:11,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:11,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:11,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:29:12,660 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:29:12,841 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-10-11 02:29:13,012 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:29:13,198 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:29:13,479 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-10-11 02:29:13,480 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:13,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:29:13,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 02:29:13,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642843541] [2021-10-11 02:29:13,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:29:13,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:29:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:29:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:29:13,483 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2021-10-11 02:29:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:13,611 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-11 02:29:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:29:13,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 02:29:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:13,613 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:29:13,613 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:29:13,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:29:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:29:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-10-11 02:29:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:29:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-11 02:29:13,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-10-11 02:29:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:13,622 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-11 02:29:13,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:29:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-11 02:29:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:29:13,623 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:13,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:13,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:13,843 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1950532691, now seen corresponding path program 3 times [2021-10-11 02:29:13,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:13,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918627496] [2021-10-11 02:29:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:13,887 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:29:13,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52831980] [2021-10-11 02:29:13,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:14,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:29:14,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:29:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 02:29:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:29:14,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:14,491 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2021-10-11 02:29:14,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918627496] [2021-10-11 02:29:14,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:29:14,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52831980] [2021-10-11 02:29:14,521 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:29:14,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100792801] [2021-10-11 02:29:14,523 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:29:14,524 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:29:14,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:29:14,524 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:29:14,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:29:14,532 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@751f3dea at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) 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:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2021-10-11 02:29:14,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:14,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:29:14,535 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-10-11 02:29:14,535 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:14,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:14,759 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:29:14,759 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:29:14,759 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:29:14,759 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:29:14,759 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:29:14,759 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:29:14,759 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:29:14,759 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:29:14,760 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:29:14,760 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:29:14,765 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:29:14,765 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:29:14,765 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:29:14,765 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:29:14,775 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:29:14,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:14 BoogieIcfgContainer [2021-10-11 02:29:14,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:14,776 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:14,776 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:14,777 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:14,777 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:05" (3/4) ... [2021-10-11 02:29:14,780 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:29:14,780 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:14,781 INFO L168 Benchmark]: Toolchain (without parser) took 10138.33 ms. Allocated memory was 81.8 MB in the beginning and 192.9 MB in the end (delta: 111.1 MB). Free memory was 41.8 MB in the beginning and 168.6 MB in the end (delta: -126.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:14,782 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:14,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.09 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 41.6 MB in the beginning and 77.8 MB in the end (delta: -36.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:14,782 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.33 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 76.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:14,783 INFO L168 Benchmark]: Boogie Preprocessor took 66.70 ms. Allocated memory is still 104.9 MB. Free memory was 76.2 MB in the beginning and 75.2 MB in the end (delta: 964.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:14,783 INFO L168 Benchmark]: RCFGBuilder took 679.92 ms. Allocated memory is still 104.9 MB. Free memory was 75.2 MB in the beginning and 47.7 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:14,784 INFO L168 Benchmark]: TraceAbstraction took 9053.40 ms. Allocated memory was 104.9 MB in the beginning and 192.9 MB in the end (delta: 88.1 MB). Free memory was 47.3 MB in the beginning and 168.6 MB in the end (delta: -121.3 MB). Peak memory consumption was 81.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:14,784 INFO L168 Benchmark]: Witness Printer took 4.12 ms. Allocated memory is still 192.9 MB. Free memory is still 168.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:14,786 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 81.8 MB. Free memory is still 58.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.09 ms. Allocated memory was 81.8 MB in the beginning and 104.9 MB in the end (delta: 23.1 MB). Free memory was 41.6 MB in the beginning and 77.8 MB in the end (delta: -36.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.33 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 76.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.70 ms. Allocated memory is still 104.9 MB. Free memory was 76.2 MB in the beginning and 75.2 MB in the end (delta: 964.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 679.92 ms. Allocated memory is still 104.9 MB. Free memory was 75.2 MB in the beginning and 47.7 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9053.40 ms. Allocated memory was 104.9 MB in the beginning and 192.9 MB in the end (delta: 88.1 MB). Free memory was 47.3 MB in the beginning and 168.6 MB in the end (delta: -121.3 MB). Peak memory consumption was 81.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.12 ms. Allocated memory is still 192.9 MB. Free memory is still 168.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND TRUE !cond [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI 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 -> fceaf8568616da2f46609328370427e58ff9204a [2021-10-11 02:29:17,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:17,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:17,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:17,856 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:17,859 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:17,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/ifeqn1.c [2021-10-11 02:29:17,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data/ff70145ac/53b0b7b88ed748088dd8f80e11bd780b/FLAG1c36e7982 [2021-10-11 02:29:18,408 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:18,409 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/sv-benchmarks/c/array-fpi/ifeqn1.c [2021-10-11 02:29:18,415 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data/ff70145ac/53b0b7b88ed748088dd8f80e11bd780b/FLAG1c36e7982 [2021-10-11 02:29:18,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/data/ff70145ac/53b0b7b88ed748088dd8f80e11bd780b [2021-10-11 02:29:18,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:18,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:18,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:18,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:18,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:18,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:18" (1/1) ... [2021-10-11 02:29:18,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c842645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:18, skipping insertion in model container [2021-10-11 02:29:18,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:18" (1/1) ... [2021-10-11 02:29:18,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:18,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:19,031 WARN L226 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_b3bc74fc-9847-452f-a4c6-c6631014da69/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-10-11 02:29:19,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:19,070 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:19,082 WARN L226 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_b3bc74fc-9847-452f-a4c6-c6631014da69/sv-benchmarks/c/array-fpi/ifeqn1.c[589,602] [2021-10-11 02:29:19,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:19,109 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:19,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19 WrapperNode [2021-10-11 02:29:19,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:19,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:19,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:19,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:19,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:19,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:19,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:19,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:19,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,181 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... [2021-10-11 02:29:19,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:19,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:19,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:19,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:19,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:29:19,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-11 02:29:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:29:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:19,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:19,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-11 02:29:19,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:19,755 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:29:19,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:19 BoogieIcfgContainer [2021-10-11 02:29:19,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:19,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:19,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:19,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:19,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:18" (1/3) ... [2021-10-11 02:29:19,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:19, skipping insertion in model container [2021-10-11 02:29:19,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:19" (2/3) ... [2021-10-11 02:29:19,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:19, skipping insertion in model container [2021-10-11 02:29:19,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:19" (3/3) ... [2021-10-11 02:29:19,766 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn1.c [2021-10-11 02:29:19,780 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:19,783 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:19,794 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:19,820 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:19,820 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:19,820 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:19,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:19,820 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:19,820 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:19,820 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:19,820 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:19,833 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-10-11 02:29:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:29:19,838 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:19,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:19,840 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:19,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:19,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-10-11 02:29:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:19,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776861287] [2021-10-11 02:29:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:29:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:20,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:29:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:20,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:29:20,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776861287] [2021-10-11 02:29:20,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:20,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:29:20,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696302966] [2021-10-11 02:29:20,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:29:20,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:29:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:29:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:20,137 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-10-11 02:29:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:20,156 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-10-11 02:29:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:29:20,159 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-10-11 02:29:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:20,172 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:29:20,173 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:29:20,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:29:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:29:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:29:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:29:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-11 02:29:20,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-10-11 02:29:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:20,216 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-11 02:29:20,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:29:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-11 02:29:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:29:20,217 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:20,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:20,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:29:20,434 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-10-11 02:29:20,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:20,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339166206] [2021-10-11 02:29:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:29:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:20,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:29:20,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:20,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:29:20,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339166206] [2021-10-11 02:29:20,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:20,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:29:20,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253583090] [2021-10-11 02:29:20,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:29:20,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:29:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:29:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:29:20,849 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-10-11 02:29:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:21,219 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-10-11 02:29:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:29:21,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-10-11 02:29:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:21,227 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:29:21,228 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:29:21,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:29:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:29:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-11 02:29:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:29:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-11 02:29:21,235 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-11 02:29:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:21,236 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-11 02:29:21,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:29:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-11 02:29:21,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:29:21,237 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:21,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:21,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:29:21,449 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:21,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:21,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-10-11 02:29:21,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:21,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416401830] [2021-10-11 02:29:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:29:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:21,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:29:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:21,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:21,784 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-11 02:29:21,788 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:29:21,803 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:29:21,805 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:29:21,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2021-10-11 02:29:21,941 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:29:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:29:21,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:29:21,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416401830] [2021-10-11 02:29:21,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:21,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:29:21,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887769498] [2021-10-11 02:29:21,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:29:21,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:29:21,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:29:21,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:29:21,978 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2021-10-11 02:29:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:22,445 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-10-11 02:29:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:29:22,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 02:29:22,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:22,447 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:29:22,448 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:29:22,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:29:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:29:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-10-11 02:29:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:29:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-11 02:29:22,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-11 02:29:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:22,457 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-11 02:29:22,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:29:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-11 02:29:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 02:29:22,459 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:22,459 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:22,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:29:22,673 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-10-11 02:29:22,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:22,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550400175] [2021-10-11 02:29:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:29:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:29:22,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:23,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:23,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550400175] [2021-10-11 02:29:23,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819078601] [2021-10-11 02:29:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:29:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:29:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:23,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:29:23,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:29:23,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 8] total 18 [2021-10-11 02:29:23,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901509191] [2021-10-11 02:29:23,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:29:23,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:29:23,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:29:23,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:29:23,969 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2021-10-11 02:29:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:29:24,797 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-10-11 02:29:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:29:24,803 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-10-11 02:29:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:29:24,804 INFO L225 Difference]: With dead ends: 60 [2021-10-11 02:29:24,804 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:29:24,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:29:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:29:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-10-11 02:29:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:29:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-11 02:29:24,812 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-10-11 02:29:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:29:24,812 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-11 02:29:24,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:29:24,813 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-11 02:29:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 02:29:24,814 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:24,814 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:29:25,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt [2021-10-11 02:29:25,222 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:25,223 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-10-11 02:29:25,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:29:25,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216891891] [2021-10-11 02:29:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2021-10-11 02:29:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:25,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:29:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:25,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,602 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-11 02:29:25,604 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:29:25,622 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:29:25,624 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:29:25,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2021-10-11 02:29:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:29:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:29:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:29:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:29:25,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:29:25,835 INFO L348 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2021-10-11 02:29:25,836 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 165 [2021-10-11 02:29:25,854 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:29:25,974 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-10-11 02:29:25,981 INFO L625 ElimStorePlain]: treesize reduction 107, result has 60.1 percent of original size [2021-10-11 02:29:25,983 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-11 02:29:25,984 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:187, output treesize:161 [2021-10-11 02:29:26,198 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-10-11 02:29:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:29:26,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:29:27,169 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-10-11 02:29:34,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216891891] [2021-10-11 02:29:34,132 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:29:34,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757181805] [2021-10-11 02:29:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:29:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:34,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:29:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:34,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2452732c [2021-10-11 02:29:34,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702946184] [2021-10-11 02:29:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3bc74fc-9847-452f-a4c6-c6631014da69/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:29:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:29:34,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 02:29:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:29:34,652 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2452732c [2021-10-11 02:29:34,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:29:34,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:29:34,653 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-11 02:29:34,653 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:35,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2021-10-11 02:29:35,274 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:29:35,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:35 BoogieIcfgContainer [2021-10-11 02:29:35,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:35,275 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:35,275 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:35,275 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:29:35,276 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:19" (3/4) ... [2021-10-11 02:29:35,278 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:29:35,279 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:29:35,280 INFO L168 Benchmark]: Toolchain (without parser) took 16464.08 ms. Allocated memory was 52.4 MB in the beginning and 81.8 MB in the end (delta: 29.4 MB). Free memory was 29.7 MB in the beginning and 32.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,280 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 52.4 MB. Free memory was 33.7 MB in the beginning and 33.6 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:35,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.29 ms. Allocated memory is still 52.4 MB. Free memory was 29.6 MB in the beginning and 31.9 MB in the end (delta: -2.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,282 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.21 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 31.9 MB in the beginning and 51.3 MB in the end (delta: -19.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,283 INFO L168 Benchmark]: Boogie Preprocessor took 56.35 ms. Allocated memory is still 67.1 MB. Free memory was 51.3 MB in the beginning and 49.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,283 INFO L168 Benchmark]: RCFGBuilder took 545.50 ms. Allocated memory is still 67.1 MB. Free memory was 49.9 MB in the beginning and 48.9 MB in the end (delta: 936.6 kB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,284 INFO L168 Benchmark]: TraceAbstraction took 15515.15 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 48.4 MB in the beginning and 32.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:29:35,285 INFO L168 Benchmark]: Witness Printer took 3.70 ms. Allocated memory is still 81.8 MB. Free memory is still 32.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:29:35,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 52.4 MB. Free memory was 33.7 MB in the beginning and 33.6 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.29 ms. Allocated memory is still 52.4 MB. Free memory was 29.6 MB in the beginning and 31.9 MB in the end (delta: -2.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.21 ms. Allocated memory was 52.4 MB in the beginning and 67.1 MB in the end (delta: 14.7 MB). Free memory was 31.9 MB in the beginning and 51.3 MB in the end (delta: -19.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.35 ms. Allocated memory is still 67.1 MB. Free memory was 51.3 MB in the beginning and 49.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 545.50 ms. Allocated memory is still 67.1 MB. Free memory was 49.9 MB in the beginning and 48.9 MB in the end (delta: 936.6 kB). Peak memory consumption was 16.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15515.15 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 48.4 MB in the beginning and 32.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * Witness Printer took 3.70 ms. Allocated memory is still 81.8 MB. Free memory is still 32.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i