./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/ludcmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI --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 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:35:35,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:35,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:35,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:35,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:35,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:35,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:35,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:35,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:35,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:35,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:35,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:35,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:35,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:35,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:35,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:35,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:35,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:35,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:35,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:35,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:35,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:35,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:35,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:35,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:35,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:35,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:35,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:35,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:35,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:35,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:35,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:35,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:35,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:35,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:35,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:35,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:35,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:35,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:35,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:35,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:35,802 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:35:35,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:35,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:35,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:35,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:35,830 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:35,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:35,831 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:35,831 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:35,831 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:35,832 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:35:35,832 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:35,832 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:35,833 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:35:35,833 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:35:35,833 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:35,833 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:35:35,834 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:35:35,834 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:35:35,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:35,835 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:35:35,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:35:35,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:35:35,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:35,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:35,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:35,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:35,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:35:35,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:35,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:35,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:35,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:35,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:35,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:35,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:35,839 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:35:35,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:35,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:35,840 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:35:35,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:35:35,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:35,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:35,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 [2022-11-03 02:35:36,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:36,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:36,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:36,251 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:36,252 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:36,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/loops/ludcmp.c [2022-11-03 02:35:36,341 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data/c5d6e47d2/c83675f524aa46a78caaa4ba0b08b110/FLAG6875beadd [2022-11-03 02:35:36,979 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:36,983 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/sv-benchmarks/c/loops/ludcmp.c [2022-11-03 02:35:37,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data/c5d6e47d2/c83675f524aa46a78caaa4ba0b08b110/FLAG6875beadd [2022-11-03 02:35:37,325 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data/c5d6e47d2/c83675f524aa46a78caaa4ba0b08b110 [2022-11-03 02:35:37,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:37,336 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:37,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:37,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:37,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:37,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa9be3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37, skipping insertion in model container [2022-11-03 02:35:37,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:37,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:37,621 WARN L230 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_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/sv-benchmarks/c/loops/ludcmp.c[318,331] [2022-11-03 02:35:37,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:37,682 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:37,696 WARN L230 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_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/sv-benchmarks/c/loops/ludcmp.c[318,331] [2022-11-03 02:35:37,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:37,736 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:37,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37 WrapperNode [2022-11-03 02:35:37,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:37,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:37,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:37,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:37,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,759 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,790 INFO L138 Inliner]: procedures = 17, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 224 [2022-11-03 02:35:37,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:37,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:37,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:37,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:37,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,827 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:37,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:37,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:37,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:37,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (1/1) ... [2022-11-03 02:35:37,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:37,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:37,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:37,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:35:37,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:35:37,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:35:37,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-11-03 02:35:37,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-11-03 02:35:37,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:37,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:37,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:35:38,101 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:38,103 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:35:38,481 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:35:38,596 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:35:38,597 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-03 02:35:38,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:38 BoogieIcfgContainer [2022-11-03 02:35:38,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:35:38,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:35:38,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:35:38,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:35:38,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:37" (1/3) ... [2022-11-03 02:35:38,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f51b804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:38, skipping insertion in model container [2022-11-03 02:35:38,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:37" (2/3) ... [2022-11-03 02:35:38,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f51b804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:35:38, skipping insertion in model container [2022-11-03 02:35:38,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:38" (3/3) ... [2022-11-03 02:35:38,621 INFO L112 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2022-11-03 02:35:38,645 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:35:38,645 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:35:38,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:35:38,770 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1bca319a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:35:38,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:35:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 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) [2022-11-03 02:35:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:35:38,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:38,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:35:38,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash 219396429, now seen corresponding path program 1 times [2022-11-03 02:35:38,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:38,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046008767] [2022-11-03 02:35:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:38,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:38,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:39,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046008767] [2022-11-03 02:35:39,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046008767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:39,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:39,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345320417] [2022-11-03 02:35:39,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:39,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:39,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:39,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:39,228 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-03 02:35:39,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:39,361 INFO L93 Difference]: Finished difference Result 44 states and 73 transitions. [2022-11-03 02:35:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 [2022-11-03 02:35:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:39,384 INFO L225 Difference]: With dead ends: 44 [2022-11-03 02:35:39,385 INFO L226 Difference]: Without dead ends: 8 [2022-11-03 02:35:39,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:39,391 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:39,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 26 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-03 02:35:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-03 02:35:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2022-11-03 02:35:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-03 02:35:39,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-03 02:35:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:39,426 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-03 02:35:39,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-03 02:35:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-03 02:35:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 02:35:39,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:39,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 02:35:39,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:35:39,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:39,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1788574205, now seen corresponding path program 1 times [2022-11-03 02:35:39,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:39,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780915935] [2022-11-03 02:35:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:39,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:39,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780915935] [2022-11-03 02:35:39,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780915935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637528159] [2022-11-03 02:35:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:39,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:39,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:39,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:35:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:39,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:35:39,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:39,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:39,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637528159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952374378] [2022-11-03 02:35:39,877 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-03 02:35:39,878 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:39,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:39,888 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:39,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:35:40,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-03 02:35:40,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 130 [2022-11-03 02:35:40,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2022-11-03 02:35:40,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:35:40,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 21 [2022-11-03 02:35:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:40,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:40,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:40,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:40,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 412 [2022-11-03 02:35:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:40,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 334 treesize of output 301 [2022-11-03 02:35:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:40,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 369 [2022-11-03 02:35:41,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2022-11-03 02:35:41,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 96 [2022-11-03 02:35:41,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 1 [2022-11-03 02:35:41,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 1 [2022-11-03 02:35:41,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:35:41,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:35:41,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (= 5 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= |~#x~0.offset| 0) (= |~#b~0.base| 5) (not (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~n~0#1|)) (= |~#x~0.base| 6) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= 50 |ULTIMATE.start_main_~nmax~0#1|) (= |~#a~0.base| 4) (= (/ 1.0 1000000.0) |ULTIMATE.start_main_~eps~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:35:41,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:35:41,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:35:41,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-03 02:35:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742418380] [2022-11-03 02:35:41,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:41,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:35:41,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:35:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:35:41,893 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 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) [2022-11-03 02:35:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:41,990 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-03 02:35:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:35:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 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 6 [2022-11-03 02:35:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:41,991 INFO L225 Difference]: With dead ends: 18 [2022-11-03 02:35:41,992 INFO L226 Difference]: Without dead ends: 11 [2022-11-03 02:35:41,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:35:41,994 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:41,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-03 02:35:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-03 02:35:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:35:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-03 02:35:41,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-11-03 02:35:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:41,999 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-03 02:35:42,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 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) [2022-11-03 02:35:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-03 02:35:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:35:42,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:42,001 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-03 02:35:42,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:35:42,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 02:35:42,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:42,228 INFO L85 PathProgramCache]: Analyzing trace with hash 20723405, now seen corresponding path program 2 times [2022-11-03 02:35:42,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:42,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974839584] [2022-11-03 02:35:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:42,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:42,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974839584] [2022-11-03 02:35:42,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974839584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:35:42,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358645807] [2022-11-03 02:35:42,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:35:42,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:42,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:42,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:35:42,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:35:42,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:35:42,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:35:42,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:35:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:35:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:42,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:35:42,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358645807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:42,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385701527] [2022-11-03 02:35:42,992 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-03 02:35:42,992 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:42,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:42,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:42,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:35:43,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-03 02:35:43,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 35 [2022-11-03 02:35:43,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-03 02:35:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:43,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:43,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 387 treesize of output 403 [2022-11-03 02:35:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:43,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 292 [2022-11-03 02:35:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:43,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:43,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:43,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2022-11-03 02:35:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:35:43,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 289 [2022-11-03 02:35:44,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 96 [2022-11-03 02:35:44,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 1 [2022-11-03 02:35:44,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 1 [2022-11-03 02:35:44,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-03 02:35:44,298 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:35:44,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '269#(and (= 5 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |~#b~0.offset| 0) (= |~#x~0.offset| 0) (= |~#b~0.base| 5) (not (<= |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~n~0#1|)) (= |~#x~0.base| 6) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= 50 |ULTIMATE.start_main_~nmax~0#1|) (= |~#a~0.base| 4) (= (/ 1.0 1000000.0) |ULTIMATE.start_main_~eps~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:35:44,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:35:44,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:35:44,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-03 02:35:44,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805993283] [2022-11-03 02:35:44,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:44,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:35:44,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:35:44,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:35:44,608 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 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) [2022-11-03 02:35:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:44,673 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-03 02:35:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:35:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 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 9 [2022-11-03 02:35:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:44,675 INFO L225 Difference]: With dead ends: 23 [2022-11-03 02:35:44,675 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 02:35:44,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:35:44,676 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:44,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 18 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:35:44,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 02:35:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 02:35:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-11-03 02:35:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-03 02:35:44,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-11-03 02:35:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:44,681 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-03 02:35:44,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 14 states have internal predecessors, (19), 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) [2022-11-03 02:35:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-03 02:35:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:35:44,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:44,682 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2022-11-03 02:35:44,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:35:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:44,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:44,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1557369459, now seen corresponding path program 3 times [2022-11-03 02:35:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:44,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898960718] [2022-11-03 02:35:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:44,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:35:44,981 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:35:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:35:45,028 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:35:45,028 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:35:45,030 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:35:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:35:45,036 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1] [2022-11-03 02:35:45,040 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:35:45,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:35:45 BoogieIcfgContainer [2022-11-03 02:35:45,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:35:45,074 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:35:45,074 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:35:45,074 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:35:45,075 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:35:38" (3/4) ... [2022-11-03 02:35:45,078 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:35:45,078 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:35:45,079 INFO L158 Benchmark]: Toolchain (without parser) took 7742.59ms. Allocated memory was 102.8MB in the beginning and 188.7MB in the end (delta: 86.0MB). Free memory was 69.7MB in the beginning and 64.5MB in the end (delta: 5.2MB). Peak memory consumption was 93.0MB. Max. memory is 16.1GB. [2022-11-03 02:35:45,079 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 54.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:35:45,080 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.06ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 69.4MB in the beginning and 101.3MB in the end (delta: -31.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:35:45,080 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.26ms. Allocated memory is still 130.0MB. Free memory was 101.3MB in the beginning and 99.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:35:45,081 INFO L158 Benchmark]: Boogie Preprocessor took 41.00ms. Allocated memory is still 130.0MB. Free memory was 99.2MB in the beginning and 97.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:35:45,081 INFO L158 Benchmark]: RCFGBuilder took 773.18ms. Allocated memory is still 130.0MB. Free memory was 97.1MB in the beginning and 73.6MB in the end (delta: 23.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-03 02:35:45,081 INFO L158 Benchmark]: TraceAbstraction took 6464.85ms. Allocated memory was 130.0MB in the beginning and 188.7MB in the end (delta: 58.7MB). Free memory was 73.2MB in the beginning and 64.5MB in the end (delta: 8.7MB). Peak memory consumption was 68.9MB. Max. memory is 16.1GB. [2022-11-03 02:35:45,082 INFO L158 Benchmark]: Witness Printer took 4.75ms. Allocated memory is still 188.7MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:35:45,084 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 102.8MB. Free memory is still 54.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 397.06ms. Allocated memory was 102.8MB in the beginning and 130.0MB in the end (delta: 27.3MB). Free memory was 69.4MB in the beginning and 101.3MB in the end (delta: -31.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.26ms. Allocated memory is still 130.0MB. Free memory was 101.3MB in the beginning and 99.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.00ms. Allocated memory is still 130.0MB. Free memory was 99.2MB in the beginning and 97.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 773.18ms. Allocated memory is still 130.0MB. Free memory was 97.1MB in the beginning and 73.6MB in the end (delta: 23.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 6464.85ms. Allocated memory was 130.0MB in the beginning and 188.7MB in the end (delta: 58.7MB). Free memory was 73.2MB in the beginning and 64.5MB in the end (delta: 8.7MB). Peak memory consumption was 68.9MB. Max. memory is 16.1GB. * Witness Printer took 4.75ms. Allocated memory is still 188.7MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 99. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, n=5, nmax=50, x={6:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={4:0}, b={5:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20023, b={5:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20023, b={5:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20023, b={5:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20023, b={5:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20023, b={5:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, a[i][j]=20023, b={5:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={6:0}] [L96] COND FALSE !(j <= n) [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] [L7] reach_error() VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47 mSDsluCounter, 59 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 66 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 92 IncrementalHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 19 mSDtfsCounter, 92 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 159 SizeOfPredicates, 4 NumberOfNonLiveVariables, 233 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:35:45,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/ludcmp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI --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 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:35:48,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:35:48,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:35:48,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:35:48,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:35:48,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:35:48,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:35:48,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:35:48,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:35:48,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:35:48,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:35:48,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:35:48,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:35:48,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:35:48,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:35:48,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:35:48,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:35:48,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:35:48,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:35:48,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:35:48,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:35:48,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:35:48,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:35:48,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:35:48,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:35:48,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:35:48,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:35:48,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:35:48,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:35:48,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:35:48,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:35:48,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:35:48,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:35:48,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:35:48,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:35:48,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:35:48,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:35:48,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:35:48,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:35:48,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:35:48,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:35:48,197 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:35:48,253 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:35:48,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:35:48,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:35:48,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:35:48,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:35:48,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:35:48,256 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:35:48,256 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:35:48,256 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:35:48,256 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:35:48,257 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:35:48,257 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:35:48,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:35:48,258 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:35:48,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:35:48,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:35:48,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:35:48,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:35:48,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:35:48,260 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:35:48,260 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:35:48,261 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:35:48,261 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:35:48,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:35:48,262 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:35:48,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:35:48,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:35:48,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:35:48,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:35:48,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:48,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:35:48,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:35:48,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:35:48,264 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:35:48,264 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:35:48,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:35:48,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:35:48,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:35:48,266 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45bf8892eb23096ca55c36a274511a87f80900e96066e62793920cbba0252ec0 [2022-11-03 02:35:48,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:35:48,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:35:48,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:35:48,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:35:48,769 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:35:48,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/loops/ludcmp.c [2022-11-03 02:35:48,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data/bfee64883/d5c7e785bd504be982e4ad28d14f23cc/FLAG3d06b386b [2022-11-03 02:35:49,493 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:35:49,493 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/sv-benchmarks/c/loops/ludcmp.c [2022-11-03 02:35:49,507 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data/bfee64883/d5c7e785bd504be982e4ad28d14f23cc/FLAG3d06b386b [2022-11-03 02:35:49,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/data/bfee64883/d5c7e785bd504be982e4ad28d14f23cc [2022-11-03 02:35:49,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:35:49,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:35:49,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:49,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:35:49,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:35:49,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:49" (1/1) ... [2022-11-03 02:35:49,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b7f9355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:49, skipping insertion in model container [2022-11-03 02:35:49,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:35:49" (1/1) ... [2022-11-03 02:35:49,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:35:49,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:35:50,088 WARN L230 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_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/sv-benchmarks/c/loops/ludcmp.c[318,331] [2022-11-03 02:35:50,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:50,209 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:35:50,261 WARN L230 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_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/sv-benchmarks/c/loops/ludcmp.c[318,331] [2022-11-03 02:35:50,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:35:50,316 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:35:50,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50 WrapperNode [2022-11-03 02:35:50,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:35:50,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:50,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:35:50,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:35:50,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,408 INFO L138 Inliner]: procedures = 18, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 224 [2022-11-03 02:35:50,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:35:50,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:35:50,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:35:50,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:35:50,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,499 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:35:50,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:35:50,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:35:50,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:35:50,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (1/1) ... [2022-11-03 02:35:50,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:35:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:35:50,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:35:50,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:35:50,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:35:50,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2022-11-03 02:35:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2022-11-03 02:35:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:35:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:35:50,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:35:50,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:35:50,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:35:50,778 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:35:50,780 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:36:07,279 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:36:07,287 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:36:07,287 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-03 02:36:07,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:36:07 BoogieIcfgContainer [2022-11-03 02:36:07,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:36:07,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:36:07,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:36:07,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:36:07,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:35:49" (1/3) ... [2022-11-03 02:36:07,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38670830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:36:07, skipping insertion in model container [2022-11-03 02:36:07,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:35:50" (2/3) ... [2022-11-03 02:36:07,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38670830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:36:07, skipping insertion in model container [2022-11-03 02:36:07,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:36:07" (3/3) ... [2022-11-03 02:36:07,312 INFO L112 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2022-11-03 02:36:07,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:36:07,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:36:07,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:36:07,406 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9404293, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:36:07,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:36:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 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) [2022-11-03 02:36:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:36:07,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:07,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:07,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2022-11-03 02:36:07,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:07,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328432693] [2022-11-03 02:36:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:07,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:07,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:07,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:07,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:36:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:36:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:07,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:07,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:07,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328432693] [2022-11-03 02:36:07,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328432693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:07,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:07,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:36:07,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83027793] [2022-11-03 02:36:07,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:07,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:36:07,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:07,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:36:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:07,817 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:08,978 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2022-11-03 02:36:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:36:08,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 02:36:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:09,004 INFO L225 Difference]: With dead ends: 102 [2022-11-03 02:36:09,005 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 02:36:09,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:36:09,014 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 67 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:09,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 112 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:36:09,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 02:36:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2022-11-03 02:36:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2022-11-03 02:36:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-03 02:36:09,064 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2022-11-03 02:36:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:09,065 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-03 02:36:09,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-03 02:36:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:36:09,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:09,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:09,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:09,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:09,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2022-11-03 02:36:09,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:09,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456541641] [2022-11-03 02:36:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:09,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:09,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:09,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:09,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:36:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:09,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:09,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:10,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:10,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456541641] [2022-11-03 02:36:10,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456541641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:10,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [85492670] [2022-11-03 02:36:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:10,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:10,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:10,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:10,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-03 02:36:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:10,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:11,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:11,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [85492670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:11,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218972599] [2022-11-03 02:36:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:11,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:11,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:11,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:11,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:36:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:11,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:11,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:11,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:11,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218972599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:11,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:11,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-03 02:36:11,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492917635] [2022-11-03 02:36:11,725 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:11,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:36:11,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:11,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:36:11,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:36:11,727 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2022-11-03 02:36:14,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:14,638 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-11-03 02:36:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:36:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 11 [2022-11-03 02:36:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:14,650 INFO L225 Difference]: With dead ends: 38 [2022-11-03 02:36:14,650 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 02:36:14,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:36:14,652 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:14,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 24 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-03 02:36:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 02:36:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-03 02:36:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-03 02:36:14,660 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2022-11-03 02:36:14,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:14,660 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-03 02:36:14,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2022-11-03 02:36:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-03 02:36:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:36:14,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:14,662 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:14,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:14,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:15,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 02:36:15,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:15,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:15,284 INFO L85 PathProgramCache]: Analyzing trace with hash -439332020, now seen corresponding path program 2 times [2022-11-03 02:36:15,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:15,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529966926] [2022-11-03 02:36:15,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:15,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:15,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:15,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:36:16,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:16,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:16,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:36:16,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:36:16,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:16,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529966926] [2022-11-03 02:36:16,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529966926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:16,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1418645230] [2022-11-03 02:36:16,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:16,826 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:16,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:16,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:16,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 02:36:17,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:17,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:36:17,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:36:17,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1418645230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129559578] [2022-11-03 02:36:17,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:17,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:17,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:17,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:36:17,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:36:18,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:36:18,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129559578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:18,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:18,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-03 02:36:18,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436710883] [2022-11-03 02:36:18,251 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:18,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:36:18,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:36:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:36:18,261 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:21,752 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-11-03 02:36:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:36:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 02:36:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:21,756 INFO L225 Difference]: With dead ends: 126 [2022-11-03 02:36:21,756 INFO L226 Difference]: Without dead ends: 102 [2022-11-03 02:36:21,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:36:21,758 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 64 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:21,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 42 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:36:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-03 02:36:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2022-11-03 02:36:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 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) [2022-11-03 02:36:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-11-03 02:36:21,776 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 23 [2022-11-03 02:36:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:21,777 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-11-03 02:36:21,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-11-03 02:36:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:36:21,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:21,779 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:21,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:22,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:22,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:22,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:22,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 1 times [2022-11-03 02:36:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:22,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947289248] [2022-11-03 02:36:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:22,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:22,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:22,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:22,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:36:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:23,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:23,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:24,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:24,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947289248] [2022-11-03 02:36:24,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947289248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:24,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [203950486] [2022-11-03 02:36:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:24,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:24,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:24,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:24,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:36:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:25,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:26,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:26,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [203950486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:26,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281713547] [2022-11-03 02:36:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:26,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:26,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:26,238 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:26,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:36:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:26,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:26,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:27,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:36:27,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281713547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:27,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:27,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-03 02:36:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446711468] [2022-11-03 02:36:27,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:27,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:36:27,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:36:27,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:36:27,515 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:34,417 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2022-11-03 02:36:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:36:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 02:36:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:34,434 INFO L225 Difference]: With dead ends: 137 [2022-11-03 02:36:34,434 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:36:34,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:36:34,436 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:34,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 57 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 02:36:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:36:34,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-03 02:36:34,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 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) [2022-11-03 02:36:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2022-11-03 02:36:34,454 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 23 [2022-11-03 02:36:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:34,454 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2022-11-03 02:36:34,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:36:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2022-11-03 02:36:34,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:36:34,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:34,456 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:34,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-03 02:36:34,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:34,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:35,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:35,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:35,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -642360546, now seen corresponding path program 2 times [2022-11-03 02:36:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:35,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525703592] [2022-11-03 02:36:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:35,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:35,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:35,061 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:35,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:36:35,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:35,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:36,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:36,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:36,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:37,528 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:36:37,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525703592] [2022-11-03 02:36:37,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525703592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:37,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [431259945] [2022-11-03 02:36:37,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:37,528 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:36:37,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:36:37,530 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:36:37,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:36:38,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:38,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:38,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:38,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:38,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [431259945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:38,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775723916] [2022-11-03 02:36:38,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:36:38,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:38,805 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:38,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:36:39,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:36:39,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:36:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:39,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:36:40,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775723916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:36:40,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:36:40,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-03 02:36:40,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861250620] [2022-11-03 02:36:40,239 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:40,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:36:40,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:36:40,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:36:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:36:40,241 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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) [2022-11-03 02:36:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:51,834 INFO L93 Difference]: Finished difference Result 448 states and 518 transitions. [2022-11-03 02:36:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 02:36:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 31 [2022-11-03 02:36:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:51,838 INFO L225 Difference]: With dead ends: 448 [2022-11-03 02:36:51,838 INFO L226 Difference]: Without dead ends: 374 [2022-11-03 02:36:51,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=460, Invalid=1100, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:36:51,841 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 341 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:51,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 96 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-03 02:36:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-03 02:36:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 183. [2022-11-03 02:36:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 182 states have internal predecessors, (210), 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) [2022-11-03 02:36:51,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2022-11-03 02:36:51,918 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 31 [2022-11-03 02:36:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:51,919 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2022-11-03 02:36:51,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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) [2022-11-03 02:36:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2022-11-03 02:36:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:36:51,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:51,921 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:51,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-03 02:36:52,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:52,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:52,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:52,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 3 times [2022-11-03 02:36:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:36:52,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53528585] [2022-11-03 02:36:52,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:36:52,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:36:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:36:52,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:36:52,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:36:53,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-03 02:36:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-03 02:36:53,762 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:36:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:36:54,643 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-03 02:36:54,644 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:36:54,645 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:36:54,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:54,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:36:54,850 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 1] [2022-11-03 02:36:54,853 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:36:54,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:36:54 BoogieIcfgContainer [2022-11-03 02:36:54,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:36:54,911 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:36:54,911 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:36:54,911 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:36:54,912 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:36:07" (3/4) ... [2022-11-03 02:36:54,913 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 02:36:55,003 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 02:36:55,004 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:36:55,004 INFO L158 Benchmark]: Toolchain (without parser) took 65170.60ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 35.5MB in the beginning and 33.4MB in the end (delta: 2.1MB). Peak memory consumption was 22.7MB. Max. memory is 16.1GB. [2022-11-03 02:36:55,005 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 58.7MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:36:55,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 481.82ms. Allocated memory is still 58.7MB. Free memory was 35.3MB in the beginning and 38.5MB in the end (delta: -3.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:36:55,006 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.88ms. Allocated memory is still 58.7MB. Free memory was 38.3MB in the beginning and 36.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:36:55,006 INFO L158 Benchmark]: Boogie Preprocessor took 112.76ms. Allocated memory is still 58.7MB. Free memory was 36.0MB in the beginning and 33.7MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:36:55,007 INFO L158 Benchmark]: RCFGBuilder took 16767.99ms. Allocated memory is still 58.7MB. Free memory was 33.5MB in the beginning and 24.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2022-11-03 02:36:55,007 INFO L158 Benchmark]: TraceAbstraction took 47617.14ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 23.3MB in the beginning and 36.9MB in the end (delta: -13.6MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2022-11-03 02:36:55,008 INFO L158 Benchmark]: Witness Printer took 92.84ms. Allocated memory is still 79.7MB. Free memory was 36.9MB in the beginning and 33.4MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:36:55,012 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 58.7MB. Free memory is still 38.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 481.82ms. Allocated memory is still 58.7MB. Free memory was 35.3MB in the beginning and 38.5MB in the end (delta: -3.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.88ms. Allocated memory is still 58.7MB. Free memory was 38.3MB in the beginning and 36.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 112.76ms. Allocated memory is still 58.7MB. Free memory was 36.0MB in the beginning and 33.7MB in the end (delta: 2.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 16767.99ms. Allocated memory is still 58.7MB. Free memory was 33.5MB in the beginning and 24.1MB in the end (delta: 9.4MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * TraceAbstraction took 47617.14ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 23.3MB in the beginning and 36.9MB in the end (delta: -13.6MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. * Witness Printer took 92.84ms. Allocated memory is still 79.7MB. Free memory was 36.9MB in the beginning and 33.4MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={4:0}, b={5:0}, x={6:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, n=5, nmax=50, x={6:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=0, n=5, nmax=50, w=0.0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=0, n=5, nmax=50, w=0.0, x={6:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=1, n=5, nmax=50, w=20.0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=1, n=5, nmax=50, w=20.0, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=1, n=5, nmax=50, w=20.0, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=2, n=5, nmax=50, w=23.0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=2, n=5, nmax=50, w=23.0, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=2, n=5, nmax=50, w=23.0, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=3, n=5, nmax=50, w=27.0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=3, n=5, nmax=50, w=27.0, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=3, n=5, nmax=50, w=27.0, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=4, n=5, nmax=50, w=32.0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=4, n=5, nmax=50, w=32.0, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=4, n=5, nmax=50, w=32.0, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=5, n=5, nmax=50, w=38.0, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=5, n=5, nmax=50, w=38.0, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=5, n=5, nmax=50, w=38.0, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=6, n=5, nmax=50, w=45.0, x={6:0}] [L96] COND FALSE !(j <= n) VAL [a={4:0}, b={5:0}, eps=0.0000010, i=0, j=6, n=5, nmax=50, w=45.0, x={6:0}] [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] [L7] reach_error() VAL [\old(cond)=0, a={4:0}, b={5:0}, cond=0, x={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 47.5s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 26.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 570 SdHoareTripleChecker+Valid, 22.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 570 mSDsluCounter, 331 SdHoareTripleChecker+Invalid, 21.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 233 mSDsCounter, 130 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 610 IncrementalHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 130 mSolverCounterUnsat, 98 mSDtfsCounter, 610 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 541 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=5, InterpolantAutomatonStates: 66, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 225 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 7.2s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 510 ConstructedInterpolants, 0 QuantifiedInterpolants, 1988 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1084 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 360/738 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-03 02:36:55,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f235d85f-8cd0-49dc-b3a2-6c9c1a7697cb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE