./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/const_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/const_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF --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 806c78936017d752a8835e8cd9fbe8a1f06095f8d4eacbf3053870dd4f98f68e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:29:22,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:29:22,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:29:22,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:29:22,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:29:22,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:29:22,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:29:22,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:29:22,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:29:22,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:29:22,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:29:22,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:29:22,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:29:22,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:29:22,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:29:22,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:29:22,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:29:22,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:29:22,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:29:22,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:29:22,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:29:22,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:29:22,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:29:22,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:29:22,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:29:22,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:29:22,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:29:22,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:29:22,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:29:22,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:29:22,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:29:22,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:29:22,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:29:22,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:29:22,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:29:22,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:29:22,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:29:22,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:29:22,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:29:22,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:29:22,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:29:22,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:29:22,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:29:22,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:29:22,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:29:22,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:29:22,973 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:29:22,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:29:22,974 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:29:22,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:29:22,982 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:29:22,982 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:29:22,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:29:22,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:29:22,984 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:29:22,985 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:29:22,985 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:29:22,985 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:29:22,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:29:22,987 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:29:22,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:29:22,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:29:22,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:29:22,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:29:22,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:29:22,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:29:22,989 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:29:22,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:29:22,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:29:22,990 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:29:22,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:29:22,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:29:22,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:29:22,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:22,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:29:22,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:29:22,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:29:22,992 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:29:22,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:29:22,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:29:22,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:29:22,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:29:22,994 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_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 806c78936017d752a8835e8cd9fbe8a1f06095f8d4eacbf3053870dd4f98f68e [2021-11-12 22:29:23,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:29:23,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:29:23,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:29:23,394 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:29:23,395 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:29:23,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/loop-acceleration/const_1-2.c [2021-11-12 22:29:23,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/data/d1b477a02/f1aaf8742dae49c28a1be011d8b37f64/FLAG47adab323 [2021-11-12 22:29:24,011 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:29:24,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/sv-benchmarks/c/loop-acceleration/const_1-2.c [2021-11-12 22:29:24,020 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/data/d1b477a02/f1aaf8742dae49c28a1be011d8b37f64/FLAG47adab323 [2021-11-12 22:29:24,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/data/d1b477a02/f1aaf8742dae49c28a1be011d8b37f64 [2021-11-12 22:29:24,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:29:24,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:29:24,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:24,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:29:24,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:29:24,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c49dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24, skipping insertion in model container [2021-11-12 22:29:24,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:29:24,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:29:24,610 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/sv-benchmarks/c/loop-acceleration/const_1-2.c[321,334] [2021-11-12 22:29:24,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:24,636 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:29:24,648 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/sv-benchmarks/c/loop-acceleration/const_1-2.c[321,334] [2021-11-12 22:29:24,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:29:24,665 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:29:24,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24 WrapperNode [2021-11-12 22:29:24,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:29:24,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:24,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:29:24,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:29:24,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:29:24,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:29:24,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:29:24,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:29:24,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:29:24,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:29:24,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:29:24,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:29:24,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (1/1) ... [2021-11-12 22:29:24,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:29:24,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:24,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:29:24,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:29:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:29:24,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:29:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:29:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:29:25,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:29:25,040 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:29:25,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:25 BoogieIcfgContainer [2021-11-12 22:29:25,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:29:25,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:29:25,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:29:25,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:29:25,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:29:24" (1/3) ... [2021-11-12 22:29:25,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd7e858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:25, skipping insertion in model container [2021-11-12 22:29:25,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:29:24" (2/3) ... [2021-11-12 22:29:25,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd7e858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:29:25, skipping insertion in model container [2021-11-12 22:29:25,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:29:25" (3/3) ... [2021-11-12 22:29:25,055 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-2.c [2021-11-12 22:29:25,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:29:25,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:29:25,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:29:25,133 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:29:25,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:29:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 22:29:25,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:25,169 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 22:29:25,170 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:25,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:25,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1850503, now seen corresponding path program 1 times [2021-11-12 22:29:25,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:25,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997549472] [2021-11-12 22:29:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:25,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:25,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:29:25,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997549472] [2021-11-12 22:29:25,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997549472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:29:25,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:29:25,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:29:25,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036366892] [2021-11-12 22:29:25,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:29:25,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:29:25,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:29:25,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:29:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:29:25,551 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:25,603 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-12 22:29:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:29:25,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-12 22:29:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:25,615 INFO L225 Difference]: With dead ends: 13 [2021-11-12 22:29:25,621 INFO L226 Difference]: Without dead ends: 6 [2021-11-12 22:29:25,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:29:25,642 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.60ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:25,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.56ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 34.60ms Time] [2021-11-12 22:29:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-12 22:29:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-12 22:29:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-12 22:29:25,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-12 22:29:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:25,680 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-12 22:29:25,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-12 22:29:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-12 22:29:25,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:25,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-12 22:29:25,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:29:25,683 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash 56695734, now seen corresponding path program 1 times [2021-11-12 22:29:25,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:25,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378390111] [2021-11-12 22:29:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:25,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:25,782 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:29:25,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378390111] [2021-11-12 22:29:25,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378390111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:25,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325294435] [2021-11-12 22:29:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:25,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:25,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:25,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:25,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:29:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:25,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:29:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:26,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:26,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325294435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:26,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798648359] [2021-11-12 22:29:26,086 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:29:26,086 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:29:26,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:29:26,104 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:29:26,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:29:26,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,155 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:26,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:29:26,159 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:26,160 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,160 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:29:26,169 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:29:26,201 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-12 22:29:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:29:26,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,251 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:26,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:26,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:26,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:26,367 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:29:26,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:29:26,370 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:26,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,377 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:26,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:26,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,411 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:29:26,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:29:26,413 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:101 [2021-11-12 22:29:26,438 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,445 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:29:26,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,626 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:26,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-12 22:29:26,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:26,858 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-12 22:29:26,864 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-12 22:29:26,888 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:29:27,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:29:27,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:27,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-12 22:29:27,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958668030] [2021-11-12 22:29:27,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:27,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:29:27,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:29:27,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:29:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:29:27,347 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:27,398 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-12 22:29:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:29:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-12 22:29:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:27,400 INFO L225 Difference]: With dead ends: 12 [2021-11-12 22:29:27,400 INFO L226 Difference]: Without dead ends: 9 [2021-11-12 22:29:27,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:29:27,406 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:27,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 23.63ms Time] [2021-11-12 22:29:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-12 22:29:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-12 22:29:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-12 22:29:27,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-12 22:29:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:27,411 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-12 22:29:27,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-12 22:29:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:29:27,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:27,413 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-12 22:29:27,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:27,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:27,614 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash 435294279, now seen corresponding path program 2 times [2021-11-12 22:29:27,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:27,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180667292] [2021-11-12 22:29:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:27,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:27,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:29:27,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180667292] [2021-11-12 22:29:27,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180667292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:27,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812223085] [2021-11-12 22:29:27,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:29:27,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:27,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:27,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:27,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:29:27,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:29:27,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:27,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:29:27,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:27,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:27,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812223085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:27,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762475323] [2021-11-12 22:29:27,975 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:29:27,975 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:29:27,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:29:27,976 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:29:27,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:29:27,983 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:27,984 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:27,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:27,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:29:27,987 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:27,987 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:27,988 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:29:27,992 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:29:28,004 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-12 22:29:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:29:28,018 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:28,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,020 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:28,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:28,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:28,061 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:29:28,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:29:28,062 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,065 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:28,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,067 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:28,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:28,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,075 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,077 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:29:28,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:29:28,078 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:101 [2021-11-12 22:29:28,082 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,090 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:29:28,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,156 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:28,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 253 [2021-11-12 22:29:28,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:28,241 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-12 22:29:28,245 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-12 22:29:28,251 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:29:28,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:29:28,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:28,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-12 22:29:28,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237399918] [2021-11-12 22:29:28,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:28,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:29:28,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:29:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:29:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:29:28,623 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:29,012 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-12 22:29:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 22:29:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 22:29:29,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:29,014 INFO L225 Difference]: With dead ends: 18 [2021-11-12 22:29:29,014 INFO L226 Difference]: Without dead ends: 15 [2021-11-12 22:29:29,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:29:29,016 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:29,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 45 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 51.81ms Time] [2021-11-12 22:29:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-12 22:29:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-12 22:29:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-12 22:29:29,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-12 22:29:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:29,023 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-12 22:29:29,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-12 22:29:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 22:29:29,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:29,024 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-12 22:29:29,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:29,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-12 22:29:29,242 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2046822887, now seen corresponding path program 3 times [2021-11-12 22:29:29,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:29,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33144474] [2021-11-12 22:29:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:29,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:29,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:29:29,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33144474] [2021-11-12 22:29:29,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33144474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:29,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19534114] [2021-11-12 22:29:29,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:29:29,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:29,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:29,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:29,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-12 22:29:29,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:29:29,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:29:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:29:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:29,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:30,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19534114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:30,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890648087] [2021-11-12 22:29:30,099 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:29:30,099 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:29:30,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:29:30,100 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:29:30,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:29:30,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,107 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:30,107 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:29:30,109 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:30,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:29:30,112 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:29:30,122 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_11|], 21=[|v_#valid_12|]} [2021-11-12 22:29:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:29:30,136 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,136 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:30,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,140 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:30,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:30,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:30,188 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:29:30,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:29:30,194 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:30,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:30,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:30,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,206 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:29:30,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:29:30,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:101 [2021-11-12 22:29:30,212 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,217 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:29:30,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,267 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:30,286 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-12 22:29:30,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:30,345 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-12 22:29:30,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-12 22:29:30,357 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:29:30,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:29:30,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:30,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-12 22:29:30,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070841730] [2021-11-12 22:29:30,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:30,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:29:30,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:29:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:29:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2021-11-12 22:29:30,820 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:35,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:29:35,744 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-12 22:29:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:29:35,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-12 22:29:35,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:29:35,746 INFO L225 Difference]: With dead ends: 30 [2021-11-12 22:29:35,746 INFO L226 Difference]: Without dead ends: 27 [2021-11-12 22:29:35,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=449, Invalid=957, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 22:29:35,748 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.05ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.28ms IncrementalHoareTripleChecker+Time [2021-11-12 22:29:35,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 184 Unknown, 0 Unchecked, 4.05ms Time], IncrementalHoareTripleChecker [31 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 170.28ms Time] [2021-11-12 22:29:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-12 22:29:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-12 22:29:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-12 22:29:35,756 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2021-11-12 22:29:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:29:35,756 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-12 22:29:35,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:29:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-12 22:29:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:29:35,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:29:35,758 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2021-11-12 22:29:35,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:29:35,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-12 22:29:35,971 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:29:35,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:29:35,971 INFO L85 PathProgramCache]: Analyzing trace with hash 328783143, now seen corresponding path program 4 times [2021-11-12 22:29:35,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:29:35,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479324519] [2021-11-12 22:29:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:29:35,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:29:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:36,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:29:36,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479324519] [2021-11-12 22:29:36,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479324519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:29:36,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71113308] [2021-11-12 22:29:36,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-12 22:29:36,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:29:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:29:36,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:29:36,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 22:29:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:29:36,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-12 22:29:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:29:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:36,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:29:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:29:38,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71113308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:29:38,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126141873] [2021-11-12 22:29:38,223 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:29:38,224 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:29:38,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:29:38,224 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:29:38,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:29:38,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,230 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:38,231 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:29:38,235 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:29:38,235 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,236 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:29:38,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:29:38,241 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_12|], 21=[|v_#valid_13|]} [2021-11-12 22:29:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:29:38,252 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:38,253 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:29:38,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:38,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:29:38,303 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:29:38,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:29:38,305 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:38,309 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,310 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:29:38,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:29:38,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,317 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,319 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:29:38,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:29:38,320 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:101 [2021-11-12 22:29:38,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:29:38,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:29:38,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-12 22:29:38,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:29:38,467 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-12 22:29:38,470 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-12 22:29:38,477 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:29:38,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:29:38,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:29:38,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-12 22:29:38,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014492876] [2021-11-12 22:29:38,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:29:38,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-12 22:29:38,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:29:38,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-12 22:29:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1973, Unknown=0, NotChecked=0, Total=2652 [2021-11-12 22:29:38,948 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:31:27,003 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2021-11-12 22:31:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-12 22:31:27,003 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-12 22:31:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:31:27,004 INFO L225 Difference]: With dead ends: 54 [2021-11-12 22:31:27,004 INFO L226 Difference]: Without dead ends: 51 [2021-11-12 22:31:27,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 109.6s TimeCoverageRelationStatistics Valid=1754, Invalid=3645, Unknown=3, NotChecked=0, Total=5402 [2021-11-12 22:31:27,008 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 338.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.30ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 391.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:31:27,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 607 Unknown, 0 Unchecked, 4.30ms Time], IncrementalHoareTripleChecker [25 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 391.90ms Time] [2021-11-12 22:31:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-12 22:31:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-12 22:31:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-12 22:31:27,018 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2021-11-12 22:31:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:31:27,018 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-12 22:31:27,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-12 22:31:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 22:31:27,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:31:27,020 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2021-11-12 22:31:27,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:31:27,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-12 22:31:27,242 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:31:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:31:27,242 INFO L85 PathProgramCache]: Analyzing trace with hash 987089831, now seen corresponding path program 5 times [2021-11-12 22:31:27,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:31:27,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877242302] [2021-11-12 22:31:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:31:27,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:31:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:31:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:28,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:31:28,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877242302] [2021-11-12 22:31:28,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877242302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:31:28,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627393218] [2021-11-12 22:31:28,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:31:28,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:31:28,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:31:28,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:31:28,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a50712d-1243-413a-a914-18759c6be94c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:31:31,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-12 22:31:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:31:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-12 22:31:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:31:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:32,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:31:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:31:36,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627393218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:31:36,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183730600] [2021-11-12 22:31:36,301 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-12 22:31:36,302 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:31:36,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:31:36,302 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:31:36,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:31:36,306 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,307 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:31:36,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-12 22:31:36,316 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:31:36,316 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,317 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-12 22:31:36,318 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-12 22:31:36,321 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_13|], 21=[|v_#valid_14|]} [2021-11-12 22:31:36,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-12 22:31:36,333 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:31:36,333 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-12 22:31:36,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:31:36,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:31:36,393 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:31:36,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 34 [2021-11-12 22:31:36,394 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,397 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:31:36,398 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-11-12 22:31:36,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:31:36,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,406 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,407 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 101 [2021-11-12 22:31:36,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-12 22:31:36,408 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:101 [2021-11-12 22:31:36,410 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,413 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110 [2021-11-12 22:31:36,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:31:36,471 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 260 [2021-11-12 22:31:36,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:31:36,533 INFO L180 QuantifierPusher]: treesize reduction 30, result has 63.0 percent of original size [2021-11-12 22:31:36,535 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-12 22:31:36,542 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-12 22:31:37,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-12 22:31:37,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-12 22:31:37,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-12 22:31:37,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506083405] [2021-11-12 22:31:37,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-12 22:31:37,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-12 22:31:37,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:31:37,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-12 22:31:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7397, Unknown=0, NotChecked=0, Total=9900 [2021-11-12 22:31:37,217 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:31:40,181 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ 42 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 1024) (< (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 1024) (< (mod (+ 23 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 16 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 32 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 28) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 37) 4294967296) 1024) (< (mod (+ 31 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 21 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 22 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 41 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 44 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 34) 4294967296) 1024) (< (mod (+ 35 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 1024) (< (mod (+ 40 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 29 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 38) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 1024) (< (mod (+ 19 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 39) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 1024) (< (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 33) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 1024) (< (mod (+ 14 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 27) 4294967296) 1024) (< (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 43) 4294967296) 1024) (< (mod (+ 46 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 1024) (< (mod (+ 30 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 45) 4294967296) 1024) (< (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 36) 4294967296) 1024)) is different from false [2021-11-12 22:32:31,454 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 186 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:37:54,524 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 1024) (< (mod (+ 9 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 1024) (< (mod (+ 23 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 16 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 7 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 32 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 28) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 37) 4294967296) 1024) (< (mod (+ 31 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 21 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 5 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 22 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 34) 4294967296) 1024) (< (mod (+ 35 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 1024) (< (mod (+ 29 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 38) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 1024) (< (mod (+ 19 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 1024) (< (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 33) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 1024) (< (mod (+ 14 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 27) 4294967296) 1024) (< (mod (+ 3 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ 6 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 1024) (< (mod (+ 30 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 1024) (< (mod (+ 2 |c_ULTIMATE.start_main_~y~0#1|) 4294967296) 1024) (< (mod (+ |c_ULTIMATE.start_main_~y~0#1| 36) 4294967296) 1024)) is different from false