./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs2f.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_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/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_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs2f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/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_3e404851-3da7-41e2-975d-205aaa99865e/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 cd8964853d628053ec141f0834bb54931510ac76 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:22:08,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:22:08,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:22:08,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:22:08,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:22:08,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:22:08,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:22:08,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:22:08,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:22:08,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:22:08,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:22:08,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:22:08,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:22:08,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:22:08,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:22:08,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:22:08,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:22:08,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:22:08,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:22:08,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:22:08,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:22:08,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:22:08,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:22:08,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:22:08,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:22:08,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:22:08,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:22:08,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:22:08,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:22:08,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:22:08,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:22:08,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:22:08,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:22:08,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:22:08,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:22:08,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:22:08,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:22:08,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:22:08,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:22:08,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:22:08,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:22:08,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:22:08,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:22:08,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:22:08,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:22:08,882 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:22:08,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:22:08,882 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:22:08,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:22:08,883 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:22:08,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:22:08,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:22:08,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:22:08,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:22:08,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:22:08,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:22:08,884 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:22:08,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:22:08,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:22:08,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:22:08,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:22:08,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:22:08,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:22:08,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:22:08,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:22:08,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:22:08,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:22:08,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:22:08,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:22:08,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:22:08,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:22:08,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:22:08,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:08,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:22:08,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:22:08,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:22:08,890 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:22:08,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:22:08,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:22:08,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:22:08,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:22:08,891 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_3e404851-3da7-41e2-975d-205aaa99865e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd8964853d628053ec141f0834bb54931510ac76 [2021-10-11 02:22:09,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:22:09,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:22:09,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:22:09,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:22:09,253 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:22:09,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/brs2f.c [2021-10-11 02:22:09,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/data/169d6fcb2/dbdcc0d4541c4f338ae650e0256313fc/FLAG99222e687 [2021-10-11 02:22:09,796 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:22:09,796 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/sv-benchmarks/c/array-fpi/brs2f.c [2021-10-11 02:22:09,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/data/169d6fcb2/dbdcc0d4541c4f338ae650e0256313fc/FLAG99222e687 [2021-10-11 02:22:10,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/data/169d6fcb2/dbdcc0d4541c4f338ae650e0256313fc [2021-10-11 02:22:10,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:22:10,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:22:10,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:10,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:22:10,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:22:10,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61985afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10, skipping insertion in model container [2021-10-11 02:22:10,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:22:10,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:22:10,405 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_3e404851-3da7-41e2-975d-205aaa99865e/sv-benchmarks/c/array-fpi/brs2f.c[588,601] [2021-10-11 02:22:10,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:10,430 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:22:10,443 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_3e404851-3da7-41e2-975d-205aaa99865e/sv-benchmarks/c/array-fpi/brs2f.c[588,601] [2021-10-11 02:22:10,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:10,467 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:22:10,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10 WrapperNode [2021-10-11 02:22:10,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:10,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:10,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:22:10,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:22:10,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:10,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:22:10,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:22:10,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:22:10,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... [2021-10-11 02:22:10,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:22:10,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:22:10,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:22:10,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:22:10,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/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 02:22:10,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:22:10,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:22:10,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:22:10,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:22:10,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:22:10,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:22:10,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:22:10,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:22:11,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:22:11,146 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:22:11,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:11 BoogieIcfgContainer [2021-10-11 02:22:11,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:22:11,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:22:11,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:22:11,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:22:11,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:22:10" (1/3) ... [2021-10-11 02:22:11,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13134d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:11, skipping insertion in model container [2021-10-11 02:22:11,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:10" (2/3) ... [2021-10-11 02:22:11,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13134d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:11, skipping insertion in model container [2021-10-11 02:22:11,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:11" (3/3) ... [2021-10-11 02:22:11,172 INFO L111 eAbstractionObserver]: Analyzing ICFG brs2f.c [2021-10-11 02:22:11,192 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:22:11,196 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:22:11,206 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:22:11,230 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:22:11,230 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:22:11,230 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:22:11,231 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:22:11,231 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:22:11,231 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:22:11,231 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:22:11,231 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:22:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-10-11 02:22:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:22:11,249 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:11,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:22:11,250 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1441693108, now seen corresponding path program 1 times [2021-10-11 02:22:11,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:11,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165478890] [2021-10-11 02:22:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:11,442 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 02:22:11,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165478890] [2021-10-11 02:22:11,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:11,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:22:11,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435194022] [2021-10-11 02:22:11,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:22:11,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:11,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:22:11,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:22:11,466 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-10-11 02:22:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:11,498 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-11 02:22:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:22:11,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:22:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:11,509 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:22:11,509 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:22:11,512 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 02:22:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:22:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:22:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:22:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-11 02:22:11,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-11 02:22:11,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:11,545 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-11 02:22:11,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:22:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-11 02:22:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:22:11,546 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:11,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:11,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:22:11,547 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:11,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1744495143, now seen corresponding path program 1 times [2021-10-11 02:22:11,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:11,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115602602] [2021-10-11 02:22:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:11,619 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 02:22:11,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115602602] [2021-10-11 02:22:11,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:11,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:22:11,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231255236] [2021-10-11 02:22:11,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:22:11,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:22:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:22:11,624 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2021-10-11 02:22:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:11,653 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:22:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:22:11,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:22:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:11,655 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:22:11,655 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:22:11,657 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 02:22:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:22:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:22:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:22:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:22:11,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-11 02:22:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:11,663 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:22:11,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:22:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:22:11,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:22:11,664 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:11,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:11,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:22:11,666 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:11,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1755182165, now seen corresponding path program 1 times [2021-10-11 02:22:11,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:11,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110804905] [2021-10-11 02:22:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:22:11,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110804905] [2021-10-11 02:22:11,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203501975] [2021-10-11 02:22:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/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 02:22:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:11,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 02:22:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:12,039 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 02:22:12,040 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:22:12,047 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:22:12,048 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:22:12,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-10-11 02:22:12,135 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:22:12,152 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:22:12,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:22:12,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:22:12,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:22:12,208 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 02:22:12,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:12,276 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:22:12,308 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:22:12,309 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 19 treesize of output 23 [2021-10-11 02:22:12,316 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2021-10-11 02:22:12,320 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:22:12,331 INFO L625 ElimStorePlain]: treesize reduction 5, result has 64.3 percent of original size [2021-10-11 02:22:12,332 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-10-11 02:22:12,332 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:9 [2021-10-11 02:22:12,406 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 02:22:12,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810957664] [2021-10-11 02:22:12,433 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:22:12,433 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:12,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:12,449 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:12,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:12,671 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:12,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:13,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:13,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:13,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:13,849 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:14,042 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-10-11 02:22:14,186 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:22:14,353 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:22:14,598 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-10-11 02:22:14,601 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:14,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:22:14,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-10-11 02:22:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274940125] [2021-10-11 02:22:14,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 02:22:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:14,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 02:22:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:22:14,606 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 15 states. [2021-10-11 02:22:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:14,807 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:22:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:22:14,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2021-10-11 02:22:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:14,809 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:22:14,809 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:22:14,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-10-11 02:22:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:22:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2021-10-11 02:22:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:22:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 02:22:14,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-10-11 02:22:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:14,817 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 02:22:14,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 02:22:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 02:22:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:22:14,819 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:14,819 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:15,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:22:15,046 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:15,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1423970983, now seen corresponding path program 2 times [2021-10-11 02:22:15,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:15,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971267704] [2021-10-11 02:22:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:15,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971267704] [2021-10-11 02:22:15,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070493774] [2021-10-11 02:22:15,150 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_3e404851-3da7-41e2-975d-205aaa99865e/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 02:22:15,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:22:15,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:22:15,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:22:15,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:15,300 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 02:22:15,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:15,333 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 02:22:15,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078057959] [2021-10-11 02:22:15,337 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:22:15,337 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:15,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:15,337 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:15,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:15,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:15,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:15,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:15,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:15,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:15,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:15,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:15,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:15,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:16,131 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:16,352 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-10-11 02:22:16,505 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:22:16,686 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:22:16,893 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-10-11 02:22:16,894 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:16,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:22:16,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-10-11 02:22:16,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495896818] [2021-10-11 02:22:16,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:22:16,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:16,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:22:16,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:22:16,901 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 10 states. [2021-10-11 02:22:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:16,953 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-10-11 02:22:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:22:16,954 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2021-10-11 02:22:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:16,954 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:22:16,954 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:22:16,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:22:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:22:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:22:16,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:22:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:22:16,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-10-11 02:22:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:16,967 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:22:16,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:22:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:22:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:22:16,967 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:16,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:17,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-11 02:22:17,186 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:17,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1526893228, now seen corresponding path program 3 times [2021-10-11 02:22:17,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:17,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081009796] [2021-10-11 02:22:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:17,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081009796] [2021-10-11 02:22:17,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971409581] [2021-10-11 02:22:17,455 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_3e404851-3da7-41e2-975d-205aaa99865e/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 02:22:17,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:22:17,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:22:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-11 02:22:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:17,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:19,575 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#sum~0.offset| Int)) (<= (div (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0.base|) |ULTIMATE.start_main_~#sum~0.offset| 0)) c_ULTIMATE.start_main_~a~0.base) (+ c_ULTIMATE.start_main_~a~0.offset 4)) (- 1)) (- 2)) 2)) is different from false [2021-10-11 02:22:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-11 02:22:19,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828998550] [2021-10-11 02:22:19,760 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:22:19,760 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:19,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:19,760 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:19,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:19,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:20,437 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:20,685 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-10-11 02:22:20,868 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:22:21,083 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:22:21,328 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-10-11 02:22:21,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:21,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:22:21,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2021-10-11 02:22:21,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866319091] [2021-10-11 02:22:21,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-10-11 02:22:21,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:21,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-11 02:22:21,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=481, Unknown=1, NotChecked=44, Total=600 [2021-10-11 02:22:21,331 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 21 states. [2021-10-11 02:22:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:21,747 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-10-11 02:22:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:22:21,747 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 10 [2021-10-11 02:22:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:21,748 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:22:21,748 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:22:21,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=132, Invalid=741, Unknown=1, NotChecked=56, Total=930 [2021-10-11 02:22:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:22:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 02:22:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 02:22:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-10-11 02:22:21,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2021-10-11 02:22:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:21,752 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-10-11 02:22:21,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-10-11 02:22:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-10-11 02:22:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:22:21,752 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:21,753 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:21,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-11 02:22:21,978 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:21,978 INFO L82 PathProgramCache]: Analyzing trace with hash 89006562, now seen corresponding path program 4 times [2021-10-11 02:22:21,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:21,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195527903] [2021-10-11 02:22:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:22,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195527903] [2021-10-11 02:22:22,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028916201] [2021-10-11 02:22:22,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/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 02:22:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:22,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:22:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:22,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:22,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137812160] [2021-10-11 02:22:22,199 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:22:22,199 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:22,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:22,200 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:22,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:22,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:22,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:22,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:22,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:22,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:22,834 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:23,056 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-10-11 02:22:23,221 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:22:23,361 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:22:23,538 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-10-11 02:22:23,539 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:23,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:22:23,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-10-11 02:22:23,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398945987] [2021-10-11 02:22:23,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-10-11 02:22:23,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:23,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-11 02:22:23,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:22:23,541 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 13 states. [2021-10-11 02:22:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:23,633 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-10-11 02:22:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:22:23,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2021-10-11 02:22:23,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:23,634 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:22:23,634 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:22:23,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:22:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:22:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-11 02:22:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:22:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-11 02:22:23,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-10-11 02:22:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:23,639 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-11 02:22:23,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-10-11 02:22:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-11 02:22:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:22:23,640 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:23,640 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:23,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:23,858 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:23,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1191097973, now seen corresponding path program 5 times [2021-10-11 02:22:23,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:23,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312305842] [2021-10-11 02:22:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:22:23,918 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:22:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:22:23,977 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:22:23,999 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:22:23,999 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:22:24,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-10-11 02:22:24,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:22:24 BoogieIcfgContainer [2021-10-11 02:22:24,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:22:24,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:22:24,047 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:22:24,047 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:22:24,048 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:11" (3/4) ... [2021-10-11 02:22:24,050 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:22:24,101 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e404851-3da7-41e2-975d-205aaa99865e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:22:24,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:22:24,102 INFO L168 Benchmark]: Toolchain (without parser) took 13916.36 ms. Allocated memory was 88.1 MB in the beginning and 197.1 MB in the end (delta: 109.1 MB). Free memory was 52.2 MB in the beginning and 172.5 MB in the end (delta: -120.3 MB). Peak memory consumption was 104.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:24,103 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory was 68.4 MB in the beginning and 68.4 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:22:24,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.89 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 52.0 MB in the beginning and 89.5 MB in the end (delta: -37.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:24,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.37 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 87.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:24,104 INFO L168 Benchmark]: Boogie Preprocessor took 26.74 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 86.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:24,104 INFO L168 Benchmark]: RCFGBuilder took 613.69 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 62.3 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:24,105 INFO L168 Benchmark]: TraceAbstraction took 12884.23 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 91.2 MB in the beginning and 59.7 MB in the end (delta: 31.6 MB). Peak memory consumption was 113.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:24,105 INFO L168 Benchmark]: Witness Printer took 54.78 ms. Allocated memory is still 197.1 MB. Free memory was 59.7 MB in the beginning and 172.5 MB in the end (delta: -112.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:22:24,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory was 68.4 MB in the beginning and 68.4 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.89 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 52.0 MB in the beginning and 89.5 MB in the end (delta: -37.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.37 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 87.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.74 ms. Allocated memory is still 113.2 MB. Free memory was 87.8 MB in the beginning and 86.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 613.69 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 62.3 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12884.23 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 91.2 MB in the beginning and 59.7 MB in the end (delta: 31.6 MB). Peak memory consumption was 113.9 MB. Max. memory is 16.1 GB. * Witness Printer took 54.78 ms. Allocated memory is still 197.1 MB. Free memory was 59.7 MB in the beginning and 172.5 MB in the end (delta: -112.8 MB). Peak memory consumption was 4.2 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] i=0 VAL [N=3] [L31] COND TRUE i