./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res2o.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res2o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0 --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 c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- 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-e04fb08 [2022-11-16 19:55:45,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:55:45,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:55:45,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:55:45,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:55:45,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:55:45,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:55:45,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:55:45,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:55:45,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:55:45,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:55:45,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:55:45,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:55:45,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:55:45,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:55:45,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:55:45,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:55:45,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:55:45,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:55:45,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:55:45,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:55:45,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:55:45,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:55:45,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:55:45,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:55:45,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:55:45,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:55:45,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:55:45,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:55:45,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:55:45,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:55:45,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:55:45,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:55:45,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:55:46,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:55:46,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:55:46,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:55:46,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:55:46,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:55:46,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:55:46,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:55:46,007 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:55:46,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:55:46,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:55:46,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:55:46,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:55:46,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:55:46,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:55:46,061 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:55:46,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:55:46,061 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:55:46,062 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:55:46,063 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:55:46,063 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:55:46,064 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:55:46,064 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:55:46,064 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:55:46,065 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:55:46,065 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:55:46,065 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:55:46,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:55:46,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:55:46,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:55:46,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:55:46,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:55:46,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:55:46,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:55:46,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:55:46,069 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:55:46,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:55:46,070 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:55:46,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:55:46,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:55:46,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:55:46,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:55:46,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:55:46,072 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:55:46,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:55:46,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:55:46,073 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:55:46,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:55:46,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:55:46,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:55:46,074 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_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2022-11-16 19:55:46,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:55:46,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:55:46,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:55:46,479 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:55:46,480 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:55:46,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-fpi/res2o.c [2022-11-16 19:55:46,590 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/data/78ac70edb/175cafa5d7c44570ac655d06ac33fb11/FLAG33eb86218 [2022-11-16 19:55:47,099 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:55:47,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/sv-benchmarks/c/array-fpi/res2o.c [2022-11-16 19:55:47,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/data/78ac70edb/175cafa5d7c44570ac655d06ac33fb11/FLAG33eb86218 [2022-11-16 19:55:47,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/data/78ac70edb/175cafa5d7c44570ac655d06ac33fb11 [2022-11-16 19:55:47,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:55:47,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:55:47,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:55:47,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:55:47,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:55:47,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67f5233d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47, skipping insertion in model container [2022-11-16 19:55:47,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:55:47,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:55:47,751 WARN L229 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_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2022-11-16 19:55:47,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:55:47,785 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:55:47,799 WARN L229 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_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2022-11-16 19:55:47,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:55:47,826 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:55:47,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47 WrapperNode [2022-11-16 19:55:47,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:55:47,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:55:47,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:55:47,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:55:47,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,871 INFO L138 Inliner]: procedures = 17, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 121 [2022-11-16 19:55:47,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:55:47,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:55:47,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:55:47,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:55:47,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,911 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:55:47,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:55:47,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:55:47,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:55:47,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (1/1) ... [2022-11-16 19:55:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:55:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:55:47,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:55:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:55:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:55:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:55:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:55:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:55:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 19:55:48,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:55:48,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:55:48,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:55:48,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:55:48,098 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:55:48,100 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:55:48,325 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:55:48,398 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:55:48,398 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 19:55:48,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:55:48 BoogieIcfgContainer [2022-11-16 19:55:48,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:55:48,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:55:48,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:55:48,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:55:48,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:55:47" (1/3) ... [2022-11-16 19:55:48,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9ac2bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:55:48, skipping insertion in model container [2022-11-16 19:55:48,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:55:47" (2/3) ... [2022-11-16 19:55:48,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9ac2bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:55:48, skipping insertion in model container [2022-11-16 19:55:48,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:55:48" (3/3) ... [2022-11-16 19:55:48,412 INFO L112 eAbstractionObserver]: Analyzing ICFG res2o.c [2022-11-16 19:55:48,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:55:48,429 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:55:48,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:55:48,482 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;@14e706d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:55:48,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:55:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 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) [2022-11-16 19:55:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:55:48,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:48,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:48,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:55:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1251409213, now seen corresponding path program 1 times [2022-11-16 19:55:48,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:55:48,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022879992] [2022-11-16 19:55:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:55:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:48,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:55:48,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022879992] [2022-11-16 19:55:48,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022879992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:48,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:48,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:55:48,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891381888] [2022-11-16 19:55:49,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:49,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:55:49,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:55:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:55:49,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:55:49,079 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:49,210 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2022-11-16 19:55:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:55:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:55:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:49,256 INFO L225 Difference]: With dead ends: 26 [2022-11-16 19:55:49,256 INFO L226 Difference]: Without dead ends: 12 [2022-11-16 19:55:49,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:55:49,265 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:49,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:55:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-16 19:55:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-16 19:55:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 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) [2022-11-16 19:55:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-16 19:55:49,322 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2022-11-16 19:55:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:49,323 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-16 19:55:49,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-16 19:55:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:55:49,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:49,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:49,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:55:49,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:55:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash -28237853, now seen corresponding path program 1 times [2022-11-16 19:55:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:55:49,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308041612] [2022-11-16 19:55:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:49,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:55:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:49,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:55:49,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308041612] [2022-11-16 19:55:49,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308041612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:49,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:49,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:55:49,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532929437] [2022-11-16 19:55:49,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:49,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:49,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:55:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:49,536 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-16 19:55:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:49,592 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2022-11-16 19:55:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:55:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 [2022-11-16 19:55:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:49,594 INFO L225 Difference]: With dead ends: 24 [2022-11-16 19:55:49,594 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 19:55:49,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:49,600 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:49,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:55:49,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 19:55:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-16 19:55:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2022-11-16 19:55:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-16 19:55:49,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2022-11-16 19:55:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:49,610 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-16 19:55:49,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-16 19:55:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-16 19:55:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:55:49,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:49,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:55:49,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:55:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -807325923, now seen corresponding path program 1 times [2022-11-16 19:55:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:55:49,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809099000] [2022-11-16 19:55:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:55:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:52,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:55:52,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809099000] [2022-11-16 19:55:52,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809099000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:55:52,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353863322] [2022-11-16 19:55:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:52,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:55:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:55:52,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:55:52,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:55:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 19:55:52,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:52,881 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:55:52,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 19:55:52,926 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-11-16 19:55:53,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 19:55:53,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:55:53,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-16 19:55:53,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 46 [2022-11-16 19:55:54,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2022-11-16 19:55:54,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2022-11-16 19:55:54,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-16 19:55:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:54,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:56:03,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353863322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:03,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488528792] [2022-11-16 19:56:03,621 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:56:03,638 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:56:03,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:56:03,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:56:03,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:56:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:03,980 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-16 19:56:03,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-16 19:56:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,037 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:56:04,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 19:56:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,396 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-16 19:56:04,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-16 19:56:04,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 19:56:04,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:04,836 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 19:56:04,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-11-16 19:56:05,054 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:05,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:56:05,131 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 19:56:05,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 19:56:05,173 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:05,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:56:05,252 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 19:56:05,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 19:56:05,303 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:05,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:05,346 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 19:56:05,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:56:05,439 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:05,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:05,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:05,542 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 19:56:05,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:56:05,649 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:05,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:05,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:05,726 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 19:56:05,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:56:05,806 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:05,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:05,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:56:06,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '281#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 19:56:06,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:56:06,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:56:06,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-11-16 19:56:06,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52895830] [2022-11-16 19:56:06,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:56:06,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 19:56:06,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:56:06,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 19:56:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1561, Unknown=2, NotChecked=0, Total=1806 [2022-11-16 19:56:06,708 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2022-11-16 19:56:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:07,608 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-11-16 19:56:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 19:56:07,617 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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 16 [2022-11-16 19:56:07,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:07,619 INFO L225 Difference]: With dead ends: 25 [2022-11-16 19:56:07,619 INFO L226 Difference]: Without dead ends: 22 [2022-11-16 19:56:07,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=357, Invalid=1993, Unknown=2, NotChecked=0, Total=2352 [2022-11-16 19:56:07,622 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:07,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-11-16 19:56:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-16 19:56:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-11-16 19:56:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-11-16 19:56:07,631 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 16 [2022-11-16 19:56:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:07,631 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-11-16 19:56:07,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2022-11-16 19:56:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-11-16 19:56:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 19:56:07,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:07,632 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:56:07,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 19:56:07,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:07,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:56:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash 185398045, now seen corresponding path program 2 times [2022-11-16 19:56:07,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:56:07,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086800394] [2022-11-16 19:56:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:07,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:56:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:56:07,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:56:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086800394] [2022-11-16 19:56:07,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086800394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:56:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293054750] [2022-11-16 19:56:07,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:56:07,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:07,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:56:07,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:56:07,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:56:08,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:56:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:56:08,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:56:08,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:56:08,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 19:56:08,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293054750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:08,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [356412545] [2022-11-16 19:56:08,198 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:56:08,199 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:56:08,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:56:08,199 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:56:08,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:56:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,265 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:56:08,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 19:56:08,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,556 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-16 19:56:08,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-16 19:56:08,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 25 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2022-11-16 19:56:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 19:56:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:08,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:09,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:09,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:09,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:09,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:09,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:09,079 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 19:56:09,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-11-16 19:56:09,290 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:09,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:56:09,365 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 19:56:09,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 19:56:09,412 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:09,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:56:09,489 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 19:56:09,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 19:56:09,526 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:09,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:09,574 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 19:56:09,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:56:09,660 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:09,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:09,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:09,759 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 19:56:09,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 19:56:09,859 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:09,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:09,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:09,946 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 19:56:09,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 19:56:10,048 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:10,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:10,090 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:56:10,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '484#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 19:56:10,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:56:10,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:56:10,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-16 19:56:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116095833] [2022-11-16 19:56:10,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:56:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 19:56:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:56:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 19:56:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:56:10,734 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-11-16 19:56:10,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:10,929 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-11-16 19:56:10,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:56:10,934 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 17 [2022-11-16 19:56:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:10,935 INFO L225 Difference]: With dead ends: 57 [2022-11-16 19:56:10,935 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 19:56:10,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:56:10,937 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:10,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 12 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:56:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 19:56:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-11-16 19:56:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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) [2022-11-16 19:56:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-11-16 19:56:10,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2022-11-16 19:56:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:10,947 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-11-16 19:56:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-11-16 19:56:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-11-16 19:56:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:56:10,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:10,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:56:10,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:11,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:11,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:56:11,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash 795195426, now seen corresponding path program 3 times [2022-11-16 19:56:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:56:11,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056711275] [2022-11-16 19:56:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:56:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:56:11,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:56:11,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056711275] [2022-11-16 19:56:11,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056711275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:56:11,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059551571] [2022-11-16 19:56:11,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:56:11,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:56:11,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:56:11,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:56:11,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:56:11,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:56:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:56:11,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:56:11,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:56:11,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059551571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:11,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323119917] [2022-11-16 19:56:11,501 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:56:11,502 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:56:11,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:56:11,502 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:56:11,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:56:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,551 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:56:11,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 19:56:11,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,788 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-16 19:56:11,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-16 19:56:11,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:11,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,090 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-16 19:56:12,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-16 19:56:12,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 19:56:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:12,535 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 19:56:12,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-11-16 19:56:12,688 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:12,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:56:12,747 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 19:56:12,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 19:56:12,820 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:12,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:56:12,888 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 19:56:12,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 19:56:12,945 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:56:12,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:12,988 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 19:56:12,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:56:13,073 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:13,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:13,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:13,157 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 19:56:13,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:56:13,299 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:13,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:13,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:13,385 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 19:56:13,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 19:56:13,490 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:56:13,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:56:13,526 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:56:14,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '760#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 19:56:14,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:56:14,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:56:14,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-16 19:56:14,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237600629] [2022-11-16 19:56:14,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:56:14,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 19:56:14,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:56:14,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 19:56:14,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:56:14,131 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:14,290 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-16 19:56:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:56:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 19:56:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:14,292 INFO L225 Difference]: With dead ends: 28 [2022-11-16 19:56:14,292 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 19:56:14,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:56:14,293 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:14,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:56:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 19:56:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-16 19:56:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-16 19:56:14,301 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-11-16 19:56:14,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:14,302 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-16 19:56:14,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-16 19:56:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 19:56:14,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:14,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:56:14,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:14,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:14,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:56:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:14,515 INFO L85 PathProgramCache]: Analyzing trace with hash -418289731, now seen corresponding path program 4 times [2022-11-16 19:56:14,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:56:14,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847894209] [2022-11-16 19:56:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:14,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:56:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:56:18,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:56:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847894209] [2022-11-16 19:56:18,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847894209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:56:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081741622] [2022-11-16 19:56:18,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:56:18,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:18,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:56:18,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:56:18,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:56:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:18,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 19:56:18,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:18,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:56:18,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:18,409 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:56:18,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2022-11-16 19:56:18,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-16 19:56:18,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:18,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 19:56:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:18,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-11-16 19:56:19,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-16 19:56:19,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 67 [2022-11-16 19:56:19,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 74 [2022-11-16 19:56:19,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:56:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:19,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 87 [2022-11-16 19:56:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:20,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:20,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:20,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2022-11-16 19:56:20,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:20,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:20,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:20,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 82 [2022-11-16 19:56:20,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:20,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 81 [2022-11-16 19:56:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:21,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 82 [2022-11-16 19:56:21,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:21,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-11-16 19:56:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:21,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-11-16 19:56:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:56:21,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:04,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081741622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:04,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931118305] [2022-11-16 19:59:04,741 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:59:04,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:59:04,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:59:04,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:59:04,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:59:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,022 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-16 19:59:05,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-16 19:59:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,069 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:59:05,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 19:59:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,366 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-16 19:59:05,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-16 19:59:05,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 19:59:05,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,712 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 19:59:05,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-11-16 19:59:05,836 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:59:05,852 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:59:05,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 73 [2022-11-16 19:59:05,917 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:59:05,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:05,976 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 19:59:05,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 19:59:06,008 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 19:59:06,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:06,045 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 19:59:06,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 19:59:06,117 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:59:06,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:59:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:06,194 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 19:59:06,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 19:59:06,270 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:59:06,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:59:06,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:06,346 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 19:59:06,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 19:59:06,445 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 19:59:06,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 19:59:06,480 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:59:09,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1043#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 19:59:09,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:59:09,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:59:09,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 57 [2022-11-16 19:59:09,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540992562] [2022-11-16 19:59:09,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:09,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 19:59:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:09,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 19:59:09,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3281, Unknown=49, NotChecked=0, Total=3660 [2022-11-16 19:59:09,537 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 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) [2022-11-16 19:59:53,916 WARN L233 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 130 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:00:46,109 WARN L233 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:00:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:48,349 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2022-11-16 20:00:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 20:00:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 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 22 [2022-11-16 20:00:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:48,352 INFO L225 Difference]: With dead ends: 61 [2022-11-16 20:00:48,352 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 20:00:48,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 265.4s TimeCoverageRelationStatistics Valid=641, Invalid=5609, Unknown=70, NotChecked=0, Total=6320 [2022-11-16 20:00:48,355 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:48,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 140 Invalid, 0 Unknown, 438 Unchecked, 0.3s Time] [2022-11-16 20:00:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 20:00:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2022-11-16 20:00:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 45 states have internal predecessors, (61), 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) [2022-11-16 20:00:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-11-16 20:00:48,400 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 22 [2022-11-16 20:00:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:48,401 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-11-16 20:00:48,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 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) [2022-11-16 20:00:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-11-16 20:00:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 20:00:48,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:48,403 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:48,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:00:48,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:48,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash -166007597, now seen corresponding path program 5 times [2022-11-16 20:00:48,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036153324] [2022-11-16 20:00:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:48,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:00:48,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:48,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036153324] [2022-11-16 20:00:48,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036153324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:00:48,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649304631] [2022-11-16 20:00:48,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:00:48,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:48,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:00:48,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:00:48,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:00:48,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:00:48,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:00:48,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:00:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:00:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:00:49,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:00:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:00:49,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649304631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:00:49,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330250931] [2022-11-16 20:00:49,125 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 20:00:49,125 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:00:49,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:00:49,125 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:00:49,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:00:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,173 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 20:00:49,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 20:00:49,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,423 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-16 20:00:49,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-16 20:00:49,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,717 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-16 20:00:49,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-16 20:00:49,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:49,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 20:00:50,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:50,126 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-16 20:00:50,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 41 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 616 treesize of output 604 [2022-11-16 20:00:50,263 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 20:00:50,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:50,318 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 20:00:50,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 20:00:50,351 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 20:00:50,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:50,406 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 20:00:50,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 20:00:50,447 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 20:00:50,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:50,498 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:00:50,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:00:50,573 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:00:50,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:00:50,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:50,651 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:00:50,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:00:50,742 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:00:50,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:00:50,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:50,821 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:00:50,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:00:50,892 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:00:50,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:00:50,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:00:51,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1431#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:00:51,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:00:51,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:00:51,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-16 20:00:51,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850236816] [2022-11-16 20:00:51,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:00:51,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 20:00:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 20:00:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:00:51,526 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:51,788 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2022-11-16 20:00:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:00:51,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 20:00:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:51,790 INFO L225 Difference]: With dead ends: 98 [2022-11-16 20:00:51,790 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 20:00:51,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-11-16 20:00:51,791 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:51,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:00:51,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 20:00:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2022-11-16 20:00:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 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) [2022-11-16 20:00:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-16 20:00:51,807 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 23 [2022-11-16 20:00:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:51,808 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-16 20:00:51,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-16 20:00:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:00:51,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:51,809 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:51,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 20:00:52,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:52,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2025626749, now seen corresponding path program 6 times [2022-11-16 20:00:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:52,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179126046] [2022-11-16 20:00:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:52,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:00:52,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:52,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179126046] [2022-11-16 20:00:52,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179126046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:00:52,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632032566] [2022-11-16 20:00:52,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:00:52,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:52,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:00:52,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:00:52,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:00:52,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:00:52,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:00:52,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 20:00:52,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:00:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:00:52,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:00:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:00:52,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632032566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:00:52,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976809266] [2022-11-16 20:00:52,618 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 20:00:52,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:00:52,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:00:52,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:00:52,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:00:52,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,891 INFO L321 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-16 20:00:52,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-16 20:00:52,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,280 INFO L321 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-16 20:00:53,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-16 20:00:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-16 20:00:53,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 39 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-11-16 20:00:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:53,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:53,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:53,747 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-16 20:00:53,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 34 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 26 case distinctions, treesize of input 611 treesize of output 605 [2022-11-16 20:00:54,050 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 20:00:54,066 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 20:00:54,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 73 [2022-11-16 20:00:54,148 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 20:00:54,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:54,207 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-16 20:00:54,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-16 20:00:54,259 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-11-16 20:00:54,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:54,305 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 20:00:54,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 20:00:54,390 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:00:54,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:00:54,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:54,462 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:00:54,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:00:54,547 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:00:54,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:00:54,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:54,624 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 20:00:54,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 20:00:54,707 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 20:00:54,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 20:00:54,745 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:00:55,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1861#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-16 20:00:55,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:00:55,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:00:55,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-11-16 20:00:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653702033] [2022-11-16 20:00:55,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:00:55,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 20:00:55,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:55,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 20:00:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-16 20:00:55,509 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-16 20:00:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:55,961 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2022-11-16 20:00:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 20:00:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 24 [2022-11-16 20:00:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:55,969 INFO L225 Difference]: With dead ends: 88 [2022-11-16 20:00:55,970 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 20:00:55,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2022-11-16 20:00:55,972 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:55,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:00:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 20:00:55,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-16 20:00:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 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) [2022-11-16 20:00:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-11-16 20:00:55,994 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2022-11-16 20:00:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:55,994 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-11-16 20:00:55,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-16 20:00:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-11-16 20:00:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 20:00:55,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:55,996 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:56,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 20:00:56,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:56,198 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:00:56,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash 596492701, now seen corresponding path program 7 times [2022-11-16 20:00:56,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:56,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359064349] [2022-11-16 20:00:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:56,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:01:02,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:02,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359064349] [2022-11-16 20:01:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359064349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:01:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913443440] [2022-11-16 20:01:02,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:01:02,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:01:02,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:01:02,196 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:01:02,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a66788a9-5fe3-4448-9ddd-c1f5b5c87e17/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:01:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:02,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-16 20:01:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:01:02,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:01:02,367 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 20:01:02,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-16 20:01:02,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:01:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:02,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 20:01:02,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:02,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:02,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-16 20:01:03,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-16 20:01:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 67 [2022-11-16 20:01:03,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:03,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 76 [2022-11-16 20:01:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 91 [2022-11-16 20:01:04,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 98 [2022-11-16 20:01:04,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:04,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 110 [2022-11-16 20:01:05,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:05,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 123 [2022-11-16 20:01:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 126 [2022-11-16 20:01:05,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:05,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 116 [2022-11-16 20:01:06,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 117 [2022-11-16 20:01:06,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 118 [2022-11-16 20:01:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:06,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 115 [2022-11-16 20:01:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:07,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:07,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 116 [2022-11-16 20:01:08,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:08,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:08,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 117 [2022-11-16 20:01:08,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 114 [2022-11-16 20:01:09,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 43 [2022-11-16 20:01:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:01:09,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:04:57,047 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (v_ArrVal_663 Int) (v_ArrVal_673 Int) (v_ArrVal_662 Int) (v_ArrVal_672 Int) (v_ArrVal_660 Int) (v_ArrVal_670 Int) (v_ArrVal_658 Int) (v_ArrVal_668 Int) (v_ArrVal_656 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_656) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset| 4) v_ArrVal_658))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_668 (+ v_ArrVal_665 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_665)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (not (<= v_ArrVal_662 (+ v_ArrVal_660 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_660)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_665 (+ v_ArrVal_663 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_663)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (< (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_673)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|)) v_ArrVal_673) (+ (* c_~N~0 3) 1)) (not (<= v_ArrVal_656 1)) (not (<= v_ArrVal_660 (+ (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (not (<= v_ArrVal_670 (+ v_ArrVal_668 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_668)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (not (<= v_ArrVal_673 (+ v_ArrVal_672 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_672)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4))))) (not (<= v_ArrVal_663 (+ v_ArrVal_662 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_662)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_658 1)) (not (<= v_ArrVal_672 (+ v_ArrVal_670 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_670)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))))))) is different from false [2022-11-16 20:04:59,957 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (v_ArrVal_653 Int) (v_ArrVal_663 Int) (v_ArrVal_662 Int) (v_ArrVal_673 Int) (v_ArrVal_672 Int) (v_ArrVal_660 Int) (v_ArrVal_670 Int) (v_ArrVal_658 Int) (v_ArrVal_668 Int) (v_ArrVal_656 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_653) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset| 4) v_ArrVal_656) (+ .cse2 8 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_658))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_663 (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_662)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) v_ArrVal_662))) (not (<= v_ArrVal_670 (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_668)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) v_ArrVal_668))) (not (<= v_ArrVal_665 (+ v_ArrVal_663 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_663)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_668 (+ v_ArrVal_665 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_665)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (not (<= v_ArrVal_662 (+ v_ArrVal_660 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_660)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_656 1)) (not (<= v_ArrVal_660 (+ (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= v_ArrVal_653 1)) (not (<= v_ArrVal_672 (+ v_ArrVal_670 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_670)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (not (<= v_ArrVal_673 (+ v_ArrVal_672 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_672)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4))))) (not (<= v_ArrVal_658 1)) (< (+ v_ArrVal_673 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_673)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (+ (* c_~N~0 3) 1)))))) is different from false