./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s3iff.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_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s3iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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 4d0f1e455156ee86cfb94207e1fcb3202634fcf0 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:24:01,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:24:01,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:24:01,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:24:01,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:24:01,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:24:01,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:24:01,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:24:01,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:24:01,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:24:01,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:24:01,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:24:01,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:24:01,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:24:01,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:24:01,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:24:01,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:24:01,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:24:01,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:24:01,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:24:01,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:24:01,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:24:01,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:24:01,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:24:01,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:24:01,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:24:01,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:24:01,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:24:01,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:24:01,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:24:01,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:24:01,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:24:01,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:24:01,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:24:01,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:24:01,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:24:01,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:24:01,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:24:01,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:24:01,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:24:01,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:24:01,757 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:24:01,785 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:24:01,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:24:01,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:24:01,787 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:24:01,787 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:24:01,787 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:24:01,788 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:24:01,788 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:24:01,788 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:24:01,788 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:24:01,788 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:24:01,789 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:24:01,789 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:24:01,789 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:24:01,789 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:24:01,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:24:01,791 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:24:01,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:24:01,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:24:01,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:24:01,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:24:01,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:24:01,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:24:01,792 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:24:01,792 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:24:01,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:24:01,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:24:01,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:24:01,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:24:01,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:24:01,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:24:01,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:24:01,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:24:01,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:24:01,796 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:24:01,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:24:01,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:24:01,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:24:01,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:24:01,797 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_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0f1e455156ee86cfb94207e1fcb3202634fcf0 [2021-10-11 02:24:02,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:24:02,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:24:02,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:24:02,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:24:02,126 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:24:02,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/s3iff.c [2021-10-11 02:24:02,223 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/data/ceae55565/14621382fa18460eb4d2d49a0e6df6ce/FLAG427fb4368 [2021-10-11 02:24:02,825 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:24:02,826 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/sv-benchmarks/c/array-fpi/s3iff.c [2021-10-11 02:24:02,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/data/ceae55565/14621382fa18460eb4d2d49a0e6df6ce/FLAG427fb4368 [2021-10-11 02:24:03,203 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/data/ceae55565/14621382fa18460eb4d2d49a0e6df6ce [2021-10-11 02:24:03,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:24:03,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:24:03,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:03,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:24:03,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:24:03,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef8fe0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03, skipping insertion in model container [2021-10-11 02:24:03,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:24:03,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:24:03,422 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_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/sv-benchmarks/c/array-fpi/s3iff.c[588,601] [2021-10-11 02:24:03,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:03,448 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:24:03,461 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_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/sv-benchmarks/c/array-fpi/s3iff.c[588,601] [2021-10-11 02:24:03,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:03,485 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:24:03,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03 WrapperNode [2021-10-11 02:24:03,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:03,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:03,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:24:03,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:24:03,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:03,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:24:03,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:24:03,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:24:03,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... [2021-10-11 02:24:03,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:24:03,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:24:03,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:24:03,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:24:03,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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 02:24:03,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:24:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:24:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:24:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:24:03,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:24:03,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:24:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:24:03,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:24:04,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:24:04,093 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:24:04,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:04 BoogieIcfgContainer [2021-10-11 02:24:04,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:24:04,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:24:04,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:24:04,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:24:04,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:24:03" (1/3) ... [2021-10-11 02:24:04,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496e98ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:04, skipping insertion in model container [2021-10-11 02:24:04,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:03" (2/3) ... [2021-10-11 02:24:04,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496e98ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:04, skipping insertion in model container [2021-10-11 02:24:04,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:04" (3/3) ... [2021-10-11 02:24:04,105 INFO L111 eAbstractionObserver]: Analyzing ICFG s3iff.c [2021-10-11 02:24:04,121 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:24:04,125 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:24:04,138 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:24:04,163 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:24:04,163 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:24:04,164 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:24:04,164 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:24:04,164 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:24:04,164 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:24:04,165 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:24:04,165 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:24:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-10-11 02:24:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:24:04,194 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:04,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:24:04,195 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:04,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1591516051, now seen corresponding path program 1 times [2021-10-11 02:24:04,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:04,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619232030] [2021-10-11 02:24:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:04,431 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 02:24:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619232030] [2021-10-11 02:24:04,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:04,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:24:04,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066038708] [2021-10-11 02:24:04,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:24:04,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:04,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:24:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:24:04,456 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-10-11 02:24:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:04,507 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-11 02:24:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:24:04,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:24:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:04,517 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:24:04,517 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:24:04,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:24:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:24:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:24:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:24:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-11 02:24:04,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-11 02:24:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:04,567 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-11 02:24:04,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:24:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-11 02:24:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:24:04,569 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:04,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:04,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:24:04,570 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2098745102, now seen corresponding path program 1 times [2021-10-11 02:24:04,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:04,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345584149] [2021-10-11 02:24:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:04,721 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 02:24:04,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345584149] [2021-10-11 02:24:04,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:04,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:24:04,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896003328] [2021-10-11 02:24:04,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:24:04,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:04,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:24:04,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:24:04,726 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2021-10-11 02:24:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:04,755 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:24:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:24:04,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:24:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:04,757 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:24:04,757 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:24:04,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:24:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:24:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:24:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:24:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:24:04,762 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-11 02:24:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:04,763 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:24:04,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:24:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:24:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:24:04,763 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:04,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:04,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:24:04,768 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:04,772 INFO L82 PathProgramCache]: Analyzing trace with hash -636631016, now seen corresponding path program 1 times [2021-10-11 02:24:04,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:04,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718107906] [2021-10-11 02:24:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:04,816 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:04,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373490696] [2021-10-11 02:24:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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 02:24:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:04,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-11 02:24:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:05,067 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-11 02:24:05,077 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:05,092 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:05,100 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-11 02:24:05,102 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:05,114 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:05,115 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:24:05,116 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-10-11 02:24:05,151 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-11 02:24:05,154 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:05,185 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:05,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:24:05,187 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-10-11 02:24:05,285 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-11 02:24:05,288 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:24:05,301 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:24:05,307 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 02:24:05,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:31 [2021-10-11 02:24:05,374 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:24:05,382 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:24:05,385 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:24:05,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:24:05,400 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:24:05,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:24:05,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-10-11 02:24:05,435 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 02:24:05,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:05,484 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:24:16,837 WARN L197 SmtUtils]: Spent 9.33 s on a formula simplification that was a NOOP. DAG size: 42 [2021-10-11 02:24:16,884 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 02:24:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718107906] [2021-10-11 02:24:16,885 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373490696] [2021-10-11 02:24:16,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269689372] [2021-10-11 02:24:16,919 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:24:16,919 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:24:16,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:24:16,938 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:24:16,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:24:17,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:17,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:20,298 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 162 [2021-10-11 02:24:20,550 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:24:20,834 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:24:21,056 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:24:21,105 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:21,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:24:21,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-11 02:24:21,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677037116] [2021-10-11 02:24:21,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:24:21,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:21,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:24:21,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2021-10-11 02:24:21,110 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 12 states. [2021-10-11 02:24:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:21,314 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-11 02:24:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:24:21,315 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2021-10-11 02:24:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:21,316 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:24:21,316 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:24:21,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2021-10-11 02:24:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:24:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-11 02:24:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:24:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:24:21,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:24:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:21,324 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:24:21,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:24:21,324 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:24:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:24:21,326 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:21,326 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:21,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:24:21,543 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:21,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1739232690, now seen corresponding path program 2 times [2021-10-11 02:24:21,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:21,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956700667] [2021-10-11 02:24:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:21,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:21,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198732825] [2021-10-11 02:24:21,571 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_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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 02:24:21,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:24:21,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:24:21,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:24:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:21,706 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 02:24:21,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:21,739 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 02:24:21,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956700667] [2021-10-11 02:24:21,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:21,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198732825] [2021-10-11 02:24:21,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146569139] [2021-10-11 02:24:21,743 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:24:21,743 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:24:21,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:24:21,744 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:24:21,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:24:21,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:22,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:22,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:22,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:22,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:22,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:22,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:22,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:25,341 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:24:25,565 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:24:25,796 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:24:25,831 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:25,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:24:25,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 02:24:25,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163339955] [2021-10-11 02:24:25,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:24:25,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:25,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:24:25,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:24:25,834 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 8 states. [2021-10-11 02:24:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:25,951 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-10-11 02:24:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:24:25,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2021-10-11 02:24:25,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:25,954 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:24:25,954 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:24:25,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:24:25,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:24:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-10-11 02:24:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:24:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 02:24:25,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-10-11 02:24:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:25,971 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 02:24:25,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:24:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 02:24:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:24:25,972 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:25,972 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:26,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:24:26,191 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:26,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1542522717, now seen corresponding path program 3 times [2021-10-11 02:24:26,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:26,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504671142] [2021-10-11 02:24:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:26,203 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:26,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259674011] [2021-10-11 02:24:26,203 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_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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 02:24:26,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:24:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:24:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:24:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:26,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:26,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504671142] [2021-10-11 02:24:26,370 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:26,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259674011] [2021-10-11 02:24:26,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591210386] [2021-10-11 02:24:26,378 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:24:26,378 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:24:26,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:24:26,379 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:24:26,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:24:26,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:24:30,987 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:24:31,191 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:24:31,404 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:24:31,437 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:24:31,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:24:31,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-11 02:24:31,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276077379] [2021-10-11 02:24:31,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:24:31,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:31,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:24:31,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:24:31,440 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 9 states. [2021-10-11 02:24:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:31,549 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-11 02:24:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:24:31,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-10-11 02:24:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:31,550 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:24:31,550 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:24:31,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:24:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:24:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:24:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:24:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:24:31,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-10-11 02:24:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:31,555 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:24:31,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:24:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:24:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:24:31,555 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:31,555 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:31,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-11 02:24:31,783 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:31,783 INFO L82 PathProgramCache]: Analyzing trace with hash 573521677, now seen corresponding path program 4 times [2021-10-11 02:24:31,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:31,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51818175] [2021-10-11 02:24:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:31,794 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:24:31,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063960546] [2021-10-11 02:24:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/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 02:24:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:24:31,900 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:24:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:24:31,945 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:24:32,050 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:24:32,050 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:24:32,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:24:32,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:32 BoogieIcfgContainer [2021-10-11 02:24:32,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:32,289 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:32,289 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:32,289 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:32,290 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:04" (3/4) ... [2021-10-11 02:24:32,292 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:24:32,345 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db6c62f0-3c7e-4a7b-bae7-edd0bedb1cfb/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:24:32,345 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:32,346 INFO L168 Benchmark]: Toolchain (without parser) took 29138.47 ms. Allocated memory was 94.4 MB in the beginning and 188.7 MB in the end (delta: 94.4 MB). Free memory was 59.0 MB in the beginning and 164.9 MB in the end (delta: -105.9 MB). Peak memory consumption was 81.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:32,347 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory was 75.5 MB in the beginning and 75.4 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:32,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.05 ms. Allocated memory is still 94.4 MB. Free memory was 58.8 MB in the beginning and 71.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:32,348 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.09 ms. Allocated memory is still 94.4 MB. Free memory was 71.6 MB in the beginning and 70.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:32,348 INFO L168 Benchmark]: Boogie Preprocessor took 44.61 ms. Allocated memory is still 94.4 MB. Free memory was 70.0 MB in the beginning and 68.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:32,349 INFO L168 Benchmark]: RCFGBuilder took 521.94 ms. Allocated memory is still 94.4 MB. Free memory was 68.8 MB in the beginning and 44.9 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:32,349 INFO L168 Benchmark]: TraceAbstraction took 28191.04 ms. Allocated memory was 94.4 MB in the beginning and 157.3 MB in the end (delta: 62.9 MB). Free memory was 44.4 MB in the beginning and 44.5 MB in the end (delta: -119.2 kB). Peak memory consumption was 65.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:32,350 INFO L168 Benchmark]: Witness Printer took 57.05 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 44.5 MB in the beginning and 164.9 MB in the end (delta: -120.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:32,352 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 94.4 MB. Free memory was 75.5 MB in the beginning and 75.4 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.05 ms. Allocated memory is still 94.4 MB. Free memory was 58.8 MB in the beginning and 71.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.09 ms. Allocated memory is still 94.4 MB. Free memory was 71.6 MB in the beginning and 70.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.61 ms. Allocated memory is still 94.4 MB. Free memory was 70.0 MB in the beginning and 68.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 521.94 ms. Allocated memory is still 94.4 MB. Free memory was 68.8 MB in the beginning and 44.9 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28191.04 ms. Allocated memory was 94.4 MB in the beginning and 157.3 MB in the end (delta: 62.9 MB). Free memory was 44.4 MB in the beginning and 44.5 MB in the end (delta: -119.2 kB). Peak memory consumption was 65.7 MB. Max. memory is 16.1 GB. * Witness Printer took 57.05 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 44.5 MB in the beginning and 164.9 MB in the end (delta: -120.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i