./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:48:53,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:48:53,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:48:53,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:48:53,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:48:53,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:48:53,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:48:53,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:48:53,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:48:53,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:48:53,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:48:53,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:48:53,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:48:53,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:48:53,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:48:53,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:48:53,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:48:53,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:48:53,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:48:53,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:48:53,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:48:53,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:48:53,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:48:53,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:48:53,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:48:53,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:48:53,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:48:53,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:48:53,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:48:53,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:48:53,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:48:53,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:48:53,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:48:53,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:48:53,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:48:53,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:48:53,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:48:53,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:48:54,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:48:54,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:48:54,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:48:54,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:48:54,043 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:48:54,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:48:54,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:48:54,044 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:48:54,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:48:54,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:48:54,046 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:48:54,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:48:54,046 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:48:54,046 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:48:54,048 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:48:54,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:48:54,048 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:48:54,048 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:48:54,049 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:48:54,049 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:48:54,049 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:48:54,049 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:48:54,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:48:54,050 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:48:54,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:48:54,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:48:54,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:48:54,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:48:54,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:48:54,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:48:54,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:48:54,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:48:54,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:48:54,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:48:54,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:48:54,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:48:54,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:48:54,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:48:54,056 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:48:54,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:48:54,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:48:54,056 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:48:54,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:48:54,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:48:54,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:48:54,057 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_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2022-11-03 03:48:54,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:48:54,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:48:54,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:48:54,448 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:48:54,449 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:48:54,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-11-03 03:48:54,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/data/3b974a932/b2841c96f8ea4a62b929e451fcdc8379/FLAG0f52df31d [2022-11-03 03:48:55,097 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:48:55,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-11-03 03:48:55,110 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/data/3b974a932/b2841c96f8ea4a62b929e451fcdc8379/FLAG0f52df31d [2022-11-03 03:48:55,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/data/3b974a932/b2841c96f8ea4a62b929e451fcdc8379 [2022-11-03 03:48:55,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:48:55,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:48:55,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:48:55,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:48:55,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:48:55,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c012ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55, skipping insertion in model container [2022-11-03 03:48:55,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:48:55,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:48:55,671 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-11-03 03:48:55,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:48:55,704 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:48:55,717 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-11-03 03:48:55,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:48:55,755 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:48:55,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55 WrapperNode [2022-11-03 03:48:55,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:48:55,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:48:55,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:48:55,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:48:55,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,832 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2022-11-03 03:48:55,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:48:55,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:48:55,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:48:55,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:48:55,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,889 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:48:55,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:48:55,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:48:55,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:48:55,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (1/1) ... [2022-11-03 03:48:55,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:48:55,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:55,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:48:55,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:48:55,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:48:55,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:48:55,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:48:55,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:48:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:48:55,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:48:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:48:55,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:48:56,080 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:48:56,083 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:48:56,398 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:48:56,509 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:48:56,510 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-03 03:48:56,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:48:56 BoogieIcfgContainer [2022-11-03 03:48:56,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:48:56,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:48:56,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:48:56,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:48:56,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:48:55" (1/3) ... [2022-11-03 03:48:56,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed9dfbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:48:56, skipping insertion in model container [2022-11-03 03:48:56,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:48:55" (2/3) ... [2022-11-03 03:48:56,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed9dfbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:48:56, skipping insertion in model container [2022-11-03 03:48:56,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:48:56" (3/3) ... [2022-11-03 03:48:56,523 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2022-11-03 03:48:56,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:48:56,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:48:56,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:48:56,644 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;@46079bab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:48:56,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:48:56,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 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) [2022-11-03 03:48:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:48:56,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:56,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:56,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:56,675 INFO L85 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2022-11-03 03:48:56,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:56,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397162286] [2022-11-03 03:48:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:56,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:56,824 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:48:56,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719417909] [2022-11-03 03:48:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:56,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:56,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:56,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:56,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:48:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:56,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:48:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:57,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:57,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397162286] [2022-11-03 03:48:57,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:48:57,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719417909] [2022-11-03 03:48:57,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719417909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:57,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:57,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:48:57,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132950054] [2022-11-03 03:48:57,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:57,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:57,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:57,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:48:57,156 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:57,284 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2022-11-03 03:48:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:57,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 03:48:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:57,306 INFO L225 Difference]: With dead ends: 35 [2022-11-03 03:48:57,307 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 03:48:57,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:48:57,313 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:57,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 03:48:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-03 03:48:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2022-11-03 03:48:57,366 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 9 [2022-11-03 03:48:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:57,367 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2022-11-03 03:48:57,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2022-11-03 03:48:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 03:48:57,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:57,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:57,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:57,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:57,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash 648526984, now seen corresponding path program 1 times [2022-11-03 03:48:57,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:57,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253478988] [2022-11-03 03:48:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:57,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:57,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:48:57,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167370499] [2022-11-03 03:48:57,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:57,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:57,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:57,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:57,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:48:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:48:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:57,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:57,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253478988] [2022-11-03 03:48:57,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:48:57,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167370499] [2022-11-03 03:48:57,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167370499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:57,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:57,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:48:57,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552827895] [2022-11-03 03:48:57,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:57,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:57,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:57,738 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-11-03 03:48:57,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:57,830 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2022-11-03 03:48:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:48:57,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2022-11-03 03:48:57,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:57,832 INFO L225 Difference]: With dead ends: 47 [2022-11-03 03:48:57,832 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 03:48:57,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:57,834 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:57,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 03:48:57,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-11-03 03:48:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2022-11-03 03:48:57,842 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 11 [2022-11-03 03:48:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:57,843 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2022-11-03 03:48:57,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-11-03 03:48:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2022-11-03 03:48:57,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:48:57,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:57,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:57,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:58,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:58,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -603899039, now seen corresponding path program 1 times [2022-11-03 03:48:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:58,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466067350] [2022-11-03 03:48:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:58,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:58,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:48:58,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856493934] [2022-11-03 03:48:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:58,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:58,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:58,086 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:58,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:48:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:58,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:48:58,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:58,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:58,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:58,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466067350] [2022-11-03 03:48:58,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:48:58,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856493934] [2022-11-03 03:48:58,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856493934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:58,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:48:58,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:48:58,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861255480] [2022-11-03 03:48:58,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:58,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:48:58,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:58,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:48:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:58,178 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:58,256 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2022-11-03 03:48:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:48:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:48:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:58,258 INFO L225 Difference]: With dead ends: 50 [2022-11-03 03:48:58,258 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 03:48:58,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:48:58,260 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:58,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:48:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 03:48:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2022-11-03 03:48:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-11-03 03:48:58,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 13 [2022-11-03 03:48:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:58,268 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-11-03 03:48:58,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:48:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-11-03 03:48:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 03:48:58,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:58,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:58,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:58,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:58,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -972286329, now seen corresponding path program 1 times [2022-11-03 03:48:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:58,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602532203] [2022-11-03 03:48:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:58,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:58,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:48:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952652394] [2022-11-03 03:48:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:58,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:58,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:58,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:48:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:58,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:48:58,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:58,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:58,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602532203] [2022-11-03 03:48:58,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:48:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952652394] [2022-11-03 03:48:58,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952652394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392826518] [2022-11-03 03:48:58,733 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 03:48:58,733 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:48:58,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:48:58,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:48:58,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:48:58,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:58,922 INFO L356 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-11-03 03:48:58,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 37 treesize of output 59 [2022-11-03 03:48:58,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:59,060 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:48:59,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:48:59,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:48:59,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:49:00,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:00,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:00,130 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:49:00,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:49:00,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:00,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:00,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:01,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:01,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1392826518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:01,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:01,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2022-11-03 03:49:01,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108261561] [2022-11-03 03:49:01,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:01,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:49:01,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:01,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:49:01,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:49:01,761 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:02,131 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2022-11-03 03:49:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:49:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 03:49:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:02,134 INFO L225 Difference]: With dead ends: 50 [2022-11-03 03:49:02,134 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 03:49:02,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:49:02,140 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:02,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 6 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:49:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 03:49:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-11-03 03:49:02,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2022-11-03 03:49:02,169 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 14 [2022-11-03 03:49:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:02,170 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2022-11-03 03:49:02,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2022-11-03 03:49:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:49:02,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:02,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:02,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:02,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1749873230, now seen corresponding path program 1 times [2022-11-03 03:49:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297292186] [2022-11-03 03:49:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:02,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:02,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:02,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740867083] [2022-11-03 03:49:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:02,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:02,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:02,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:02,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:49:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:02,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:02,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:49:02,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:49:02,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297292186] [2022-11-03 03:49:02,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740867083] [2022-11-03 03:49:02,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740867083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:02,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986165630] [2022-11-03 03:49:02,546 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 03:49:02,546 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:02,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:02,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:02,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:02,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:02,634 INFO L356 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-11-03 03:49:02,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 37 treesize of output 59 [2022-11-03 03:49:02,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:02,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:02,756 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:02,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:02,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:02,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 45 [2022-11-03 03:49:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:03,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:03,230 INFO L356 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-03 03:49:03,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 386 [2022-11-03 03:49:03,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:03,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:03,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:03,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:03,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:03,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:03,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:04,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:04,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,164 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:04,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:04,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,316 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:04,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-03 03:49:04,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,407 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:04,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:04,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,526 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:04,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:04,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,578 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:04,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:04,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,673 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:04,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,784 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:49:04,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-03 03:49:04,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:04,922 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:04,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:04,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:05,006 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:05,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:05,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:05,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:05,079 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:05,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:49:05,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:05,150 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:05,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:05,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:05,307 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:05,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:05,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:05,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:05,370 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:05,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:49:05,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:05,432 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:05,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:05,438 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:06,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [986165630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:06,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:06,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2022-11-03 03:49:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802583808] [2022-11-03 03:49:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:06,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:49:06,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:49:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:49:06,227 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:07,349 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2022-11-03 03:49:07,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:49:07,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 03:49:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:07,351 INFO L225 Difference]: With dead ends: 57 [2022-11-03 03:49:07,352 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:49:07,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:49:07,353 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:07,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:49:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:49:07,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2022-11-03 03:49:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-11-03 03:49:07,373 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2022-11-03 03:49:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:07,373 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-11-03 03:49:07,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-11-03 03:49:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:49:07,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:07,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:07,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 03:49:07,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:07,597 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash -494766001, now seen corresponding path program 1 times [2022-11-03 03:49:07,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:07,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652131943] [2022-11-03 03:49:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:07,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:07,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660586033] [2022-11-03 03:49:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:07,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:07,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:07,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:07,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:49:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:07,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:49:07,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:49:07,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:07,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652131943] [2022-11-03 03:49:07,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:07,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660586033] [2022-11-03 03:49:07,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660586033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:07,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044695248] [2022-11-03 03:49:07,756 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:07,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:07,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:07,757 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:07,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:07,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:07,857 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:07,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:07,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:07,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:07,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:49:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:07,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:49:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:08,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:08,362 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:49:08,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:49:08,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:08,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:08,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:08,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:08,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:09,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:09,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:09,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,376 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:09,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:09,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,486 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:09,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-03 03:49:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,587 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:09,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:09,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,679 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:09,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:09,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,736 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:09,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:09,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,798 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:09,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:09,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,912 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:09,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:09,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:09,970 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:09,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-03 03:49:10,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,026 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:10,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:10,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,090 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:10,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:10,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,207 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:49:10,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-03 03:49:10,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,302 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:10,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:10,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,529 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:10,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:10,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,642 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:10,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:49:10,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:10,712 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:10,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:10,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:11,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2044695248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:11,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:11,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 14 [2022-11-03 03:49:11,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549355776] [2022-11-03 03:49:11,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:11,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:49:11,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:49:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:49:11,648 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:12,567 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2022-11-03 03:49:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:49:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 03:49:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:12,569 INFO L225 Difference]: With dead ends: 59 [2022-11-03 03:49:12,569 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 03:49:12,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:49:12,570 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:12,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:49:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 03:49:12,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-11-03 03:49:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-11-03 03:49:12,588 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 23 [2022-11-03 03:49:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:12,588 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-11-03 03:49:12,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-11-03 03:49:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:49:12,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:12,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:12,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 03:49:12,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:12,805 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:12,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:12,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1997306399, now seen corresponding path program 1 times [2022-11-03 03:49:12,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:12,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693080781] [2022-11-03 03:49:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:12,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:12,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823489594] [2022-11-03 03:49:12,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:12,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:12,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:12,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:12,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:49:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:12,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:12,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:49:12,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:49:12,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:12,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693080781] [2022-11-03 03:49:12,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:12,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823489594] [2022-11-03 03:49:12,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823489594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:12,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068561546] [2022-11-03 03:49:12,966 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:12,966 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:12,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:12,967 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:12,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:13,053 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:13,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:13,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:13,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:13,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:49:13,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:13,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:49:13,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:13,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:13,477 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:49:13,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:49:13,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:13,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:13,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:13,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:14,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:14,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:14,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:14,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:14,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,368 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:14,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:14,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,434 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:14,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-03 03:49:14,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,489 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:14,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:14,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,574 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:14,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:14,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,620 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:14,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:14,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,712 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:14,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,854 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:49:14,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-03 03:49:14,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,930 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:14,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:14,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:14,986 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:14,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:15,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,038 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:15,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:49:15,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,099 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:15,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:15,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,224 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:15,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:15,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,400 INFO L356 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-03 03:49:15,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-03 03:49:15,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,494 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:15,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:15,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,545 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:15,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:15,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,631 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:15,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:15,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,731 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:15,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:49:15,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,799 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:15,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:15,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,848 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:15,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:15,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:15,927 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:15,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:16,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:16,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:16,050 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:16,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:49:16,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:16,113 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:16,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:16,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:16,163 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:16,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:16,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:16,233 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:16,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:16,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:16,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:16,290 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:16,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:49:16,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:16,341 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:16,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:16,346 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:17,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1441#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:49:17,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:49:17,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:17,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-03 03:49:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236285389] [2022-11-03 03:49:17,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:17,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:49:17,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:49:17,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:49:17,536 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:17,754 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2022-11-03 03:49:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:49:17,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 [2022-11-03 03:49:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:17,755 INFO L225 Difference]: With dead ends: 95 [2022-11-03 03:49:17,755 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 03:49:17,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:49:17,756 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:17,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 14 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:49:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 03:49:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2022-11-03 03:49:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-11-03 03:49:17,779 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 24 [2022-11-03 03:49:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:17,779 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-11-03 03:49:17,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-11-03 03:49:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:49:17,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:17,781 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:17,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:18,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:18,001 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 321559483, now seen corresponding path program 2 times [2022-11-03 03:49:18,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:18,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161232296] [2022-11-03 03:49:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:18,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:18,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777113693] [2022-11-03 03:49:18,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:49:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:18,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:18,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:18,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:49:18,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:49:18,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:49:18,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:49:18,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:49:18,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:49:18,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161232296] [2022-11-03 03:49:18,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777113693] [2022-11-03 03:49:18,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777113693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574267596] [2022-11-03 03:49:18,239 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:18,239 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:18,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:18,240 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:18,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:18,313 INFO L356 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-11-03 03:49:18,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 37 treesize of output 59 [2022-11-03 03:49:18,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:18,411 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:18,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:18,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:18,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 45 [2022-11-03 03:49:18,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:18,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:18,699 INFO L356 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-03 03:49:18,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 386 [2022-11-03 03:49:18,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:18,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:18,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:19,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:19,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:19,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:19,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:19,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:19,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,425 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:19,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:19,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,475 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:19,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-03 03:49:19,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,528 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:19,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:19,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,618 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:19,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:19,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,675 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:19,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:19,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,727 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:19,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:19,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,815 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:19,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:19,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,917 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:19,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-03 03:49:19,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:19,984 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:19,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,060 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,115 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:20,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:49:20,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,163 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,302 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,413 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:20,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-03 03:49:20,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,479 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,527 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,612 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,730 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:20,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:49:20,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,795 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,843 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:20,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:20,932 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:20,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:21,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:21,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:21,032 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:21,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:49:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:21,097 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:21,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:21,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:21,150 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:21,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:21,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:21,215 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:21,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:21,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:21,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:21,268 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:21,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:49:21,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:21,311 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:21,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:21,318 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:22,637 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:49:22,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:49:22,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:22,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-03 03:49:22,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016507104] [2022-11-03 03:49:22,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:22,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:49:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:49:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:49:22,639 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:22,887 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2022-11-03 03:49:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:49:22,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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 27 [2022-11-03 03:49:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:22,890 INFO L225 Difference]: With dead ends: 162 [2022-11-03 03:49:22,890 INFO L226 Difference]: Without dead ends: 131 [2022-11-03 03:49:22,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:49:22,891 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 136 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:22,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 16 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:49:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-03 03:49:22,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2022-11-03 03:49:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2022-11-03 03:49:22,955 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 27 [2022-11-03 03:49:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:22,955 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2022-11-03 03:49:22,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2022-11-03 03:49:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:49:22,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:22,961 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:23,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:23,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:23,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:23,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1772377171, now seen corresponding path program 3 times [2022-11-03 03:49:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:23,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307378049] [2022-11-03 03:49:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:23,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:23,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:23,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203470090] [2022-11-03 03:49:23,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:49:23,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:23,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:23,201 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:23,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:49:23,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:49:23,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:49:23,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:49:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-03 03:49:23,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-03 03:49:23,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:23,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307378049] [2022-11-03 03:49:23,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203470090] [2022-11-03 03:49:23,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203470090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525802047] [2022-11-03 03:49:23,485 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:23,485 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:23,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:23,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:23,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:23,570 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:23,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:23,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:23,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:23,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:49:23,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:23,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 45 [2022-11-03 03:49:23,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:23,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:23,950 INFO L356 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-03 03:49:23,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 386 [2022-11-03 03:49:24,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:24,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:24,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:24,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:24,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:24,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:24,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:24,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:24,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:24,707 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:24,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:24,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:24,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:24,810 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:24,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-03 03:49:24,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:24,878 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:24,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:24,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:24,955 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:24,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:24,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,015 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:25,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:25,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,075 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:25,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,169 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:25,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:25,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,278 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:49:25,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-03 03:49:25,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,376 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:25,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:25,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,430 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:25,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:25,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,529 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:25,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:49:25,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,605 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:25,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:25,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,719 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:25,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:25,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,764 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:25,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:25,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,814 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:25,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:25,901 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:25,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:26,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,023 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:26,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:49:26,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,099 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:26,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:26,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,151 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:26,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:26,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,230 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:26,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:26,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,336 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:26,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:49:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,400 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:26,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:26,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,448 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:26,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:26,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,516 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:26,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:26,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,651 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:26,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:49:26,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:26,706 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:26,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:26,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:28,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2707#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:49:28,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:49:28,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:28,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-03 03:49:28,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068958514] [2022-11-03 03:49:28,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:28,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:49:28,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:49:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:49:28,461 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:28,899 INFO L93 Difference]: Finished difference Result 260 states and 355 transitions. [2022-11-03 03:49:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:49:28,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 63 [2022-11-03 03:49:28,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:28,901 INFO L225 Difference]: With dead ends: 260 [2022-11-03 03:49:28,901 INFO L226 Difference]: Without dead ends: 178 [2022-11-03 03:49:28,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 141 SyntacticMatches, 27 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:49:28,902 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:28,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 51 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:49:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-03 03:49:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2022-11-03 03:49:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 99 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2022-11-03 03:49:28,952 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 63 [2022-11-03 03:49:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:28,952 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2022-11-03 03:49:28,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2022-11-03 03:49:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 03:49:28,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:28,954 INFO L195 NwaCegarLoop]: trace histogram [32, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:28,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:29,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 03:49:29,156 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:29,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1481494967, now seen corresponding path program 4 times [2022-11-03 03:49:29,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:29,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392719410] [2022-11-03 03:49:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:29,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:29,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:29,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876373845] [2022-11-03 03:49:29,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:49:29,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:29,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:29,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:49:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:29,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:49:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-11-03 03:49:29,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-11-03 03:49:29,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:29,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392719410] [2022-11-03 03:49:29,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:29,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876373845] [2022-11-03 03:49:29,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876373845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:29,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722680559] [2022-11-03 03:49:29,510 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:29,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:29,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:29,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:29,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:29,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:29,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:29,588 INFO L356 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-11-03 03:49:29,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 37 treesize of output 59 [2022-11-03 03:49:29,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:29,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:29,676 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:29,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:29,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:49:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:29,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:30,003 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:49:30,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:49:30,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:30,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:30,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:30,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:30,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:30,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:30,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:30,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:30,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:30,785 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:30,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:30,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:30,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:30,903 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:49:30,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-03 03:49:30,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:30,969 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:30,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:31,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,051 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:31,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:31,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,092 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:31,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:31,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,166 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:31,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:31,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,281 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:49:31,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-03 03:49:31,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,401 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:31,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,453 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:31,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:31,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,551 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:31,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:49:31,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,634 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:31,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:31,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,735 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:31,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:31,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,829 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:31,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-03 03:49:31,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,888 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:31,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:31,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:31,952 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:31,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:32,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,027 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:32,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:32,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,223 INFO L356 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-03 03:49:32,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-03 03:49:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,309 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:32,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:32,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,357 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:32,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:32,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,425 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:32,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:32,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,471 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:32,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:32,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,520 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:32,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:32,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,596 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:32,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:32,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,694 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:32,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:49:32,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:32,749 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:32,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:32,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:34,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3947#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:49:34,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:49:34,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:34,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-03 03:49:34,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766600734] [2022-11-03 03:49:34,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:34,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:49:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:49:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:49:34,670 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:35,133 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2022-11-03 03:49:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:49:35,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 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 87 [2022-11-03 03:49:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:35,135 INFO L225 Difference]: With dead ends: 327 [2022-11-03 03:49:35,135 INFO L226 Difference]: Without dead ends: 235 [2022-11-03 03:49:35,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 193 SyntacticMatches, 44 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:49:35,136 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:35,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 32 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:49:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-03 03:49:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 166. [2022-11-03 03:49:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2242424242424241) internal successors, (202), 165 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2022-11-03 03:49:35,212 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 87 [2022-11-03 03:49:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:35,212 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2022-11-03 03:49:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2022-11-03 03:49:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 03:49:35,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:35,215 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:35,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:35,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:49:35,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:35,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1651562313, now seen corresponding path program 5 times [2022-11-03 03:49:35,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:35,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23380233] [2022-11-03 03:49:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:35,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:35,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473827041] [2022-11-03 03:49:35,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:49:35,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:35,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:35,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:35,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:49:35,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:49:35,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:49:35,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2022-11-03 03:49:35,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2022-11-03 03:49:35,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23380233] [2022-11-03 03:49:35,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473827041] [2022-11-03 03:49:35,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473827041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475677736] [2022-11-03 03:49:35,967 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:35,967 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:35,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:35,967 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:35,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:36,046 INFO L356 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-11-03 03:49:36,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 37 treesize of output 59 [2022-11-03 03:49:36,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:36,131 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:36,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:36,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:49:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:36,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:36,458 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:49:36,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:49:36,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:36,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:36,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:36,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:36,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:36,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:37,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:37,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:37,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,159 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:37,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:37,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,208 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:37,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-03 03:49:37,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,260 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:37,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:37,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,347 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:37,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:37,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,389 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:37,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:37,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,451 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:37,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:37,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,541 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:37,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-03 03:49:37,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,601 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:37,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:37,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,675 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:37,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:37,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,721 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:37,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:37,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,763 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:37,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,859 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:37,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:37,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:37,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,056 INFO L356 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-03 03:49:38,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-03 03:49:38,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,175 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,234 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,316 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,364 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,417 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,492 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,598 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:38,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:49:38,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,666 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,715 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,790 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,848 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:38,897 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:38,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:38,902 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:41,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5715#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:49:41,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:49:41,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:41,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-03 03:49:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125670465] [2022-11-03 03:49:41,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:41,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:49:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:49:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:49:41,259 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:41,612 INFO L93 Difference]: Finished difference Result 398 states and 510 transitions. [2022-11-03 03:49:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:49:41,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 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 135 [2022-11-03 03:49:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:41,619 INFO L225 Difference]: With dead ends: 398 [2022-11-03 03:49:41,620 INFO L226 Difference]: Without dead ends: 344 [2022-11-03 03:49:41,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 294 SyntacticMatches, 94 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:49:41,621 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 210 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:41,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 31 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:49:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-03 03:49:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 175. [2022-11-03 03:49:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2471264367816093) internal successors, (217), 174 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2022-11-03 03:49:41,693 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 135 [2022-11-03 03:49:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:41,694 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2022-11-03 03:49:41,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2022-11-03 03:49:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 03:49:41,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:41,697 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:41,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:41,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:41,905 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1487790265, now seen corresponding path program 6 times [2022-11-03 03:49:41,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:41,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236936059] [2022-11-03 03:49:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:41,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:41,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:41,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934854939] [2022-11-03 03:49:41,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:49:41,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:41,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:41,957 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:41,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:49:42,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:49:42,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:49:42,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:49:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2022-11-03 03:49:42,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2022-11-03 03:49:42,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:42,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236936059] [2022-11-03 03:49:42,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:42,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934854939] [2022-11-03 03:49:42,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934854939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:42,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400081335] [2022-11-03 03:49:42,200 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:42,200 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:42,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:42,201 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:42,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:42,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:42,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:42,270 INFO L356 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-11-03 03:49:42,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 37 treesize of output 59 [2022-11-03 03:49:42,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:42,366 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:42,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:42,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:42,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 45 [2022-11-03 03:49:42,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:42,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:42,669 INFO L356 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-03 03:49:42,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 386 [2022-11-03 03:49:42,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:42,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:42,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:43,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:43,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:43,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:43,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:43,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:43,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,369 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:43,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:43,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,424 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:43,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-03 03:49:43,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,467 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:43,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:43,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,545 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:43,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:43,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,581 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:43,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:43,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,650 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:43,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:43,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,716 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:49:43,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-03 03:49:43,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,761 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:43,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:43,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,821 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:43,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:43,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,917 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:43,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:49:43,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:43,982 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:43,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:44,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,091 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:44,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:44,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,265 INFO L356 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-03 03:49:44,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-03 03:49:44,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,349 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:44,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:44,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,399 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:44,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,495 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:44,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:44,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,542 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:44,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:44,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,596 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:44,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,684 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:44,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:44,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:44,919 INFO L356 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-03 03:49:44,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-03 03:49:44,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:45,006 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:45,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:45,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:45,056 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:45,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:45,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:45,129 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:45,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:45,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:45,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:45,264 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:45,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:49:45,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:45,322 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:45,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:45,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:48,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7633#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:49:48,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:49:48,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:48,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-03 03:49:48,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046031590] [2022-11-03 03:49:48,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:48,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:49:48,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:48,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:49:48,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:49:48,087 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:48,394 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2022-11-03 03:49:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:49:48,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-11-03 03:49:48,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:48,396 INFO L225 Difference]: With dead ends: 293 [2022-11-03 03:49:48,397 INFO L226 Difference]: Without dead ends: 234 [2022-11-03 03:49:48,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 311 SyntacticMatches, 98 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:49:48,398 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:48,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:49:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-03 03:49:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2022-11-03 03:49:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2022-11-03 03:49:48,478 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 141 [2022-11-03 03:49:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:48,479 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2022-11-03 03:49:48,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2022-11-03 03:49:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 03:49:48,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:48,481 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:48,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:48,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:48,685 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1632527579, now seen corresponding path program 7 times [2022-11-03 03:49:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:48,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231198482] [2022-11-03 03:49:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:48,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:48,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:48,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383396540] [2022-11-03 03:49:48,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:49:48,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:48,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:48,731 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:48,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:49:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:49:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:49:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2022-11-03 03:49:49,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2022-11-03 03:49:49,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:49,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231198482] [2022-11-03 03:49:49,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:49,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383396540] [2022-11-03 03:49:49,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383396540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:49,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176177147] [2022-11-03 03:49:49,464 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:49,464 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:49,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:49,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:49,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:49,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:49,548 INFO L356 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-11-03 03:49:49,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 37 treesize of output 59 [2022-11-03 03:49:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:49,652 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:49,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:49,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:49,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 45 [2022-11-03 03:49:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:49,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:49,935 INFO L356 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-03 03:49:49,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 386 [2022-11-03 03:49:50,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:50,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:50,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:49:50,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:50,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:50,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:50,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:50,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:49:50,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:50,613 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:50,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:50,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:50,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:50,721 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:50,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-03 03:49:50,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:50,782 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:50,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:50,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:50,866 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:50,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:50,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:50,909 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:50,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:50,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:50,977 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:49:50,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:49:51,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,081 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:49:51,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-03 03:49:51,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,167 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:51,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,235 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:51,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,281 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:51,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,321 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:51,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,409 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:51,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:51,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,594 INFO L356 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-03 03:49:51,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-03 03:49:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,665 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:51,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,720 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:51,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,803 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:49:51,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:49:51,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,848 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:51,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,903 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:51,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:51,975 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:51,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:52,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:52,035 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:52,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:52,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:52,087 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:52,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:52,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:52,163 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:52,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:52,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:52,207 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:52,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:52,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:52,249 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:49:52,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:49:52,256 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:49:55,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9426#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:49:55,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:49:55,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:49:55,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-03 03:49:55,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671303078] [2022-11-03 03:49:55,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:49:55,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 03:49:55,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:55,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 03:49:55,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=764, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:49:55,758 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:57,304 INFO L93 Difference]: Finished difference Result 831 states and 1217 transitions. [2022-11-03 03:49:57,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:49:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-03 03:49:57,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:57,307 INFO L225 Difference]: With dead ends: 831 [2022-11-03 03:49:57,308 INFO L226 Difference]: Without dead ends: 664 [2022-11-03 03:49:57,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 294 SyntacticMatches, 100 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=745, Invalid=1325, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:49:57,310 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 842 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:57,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 68 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:49:57,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-03 03:49:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 313. [2022-11-03 03:49:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.185897435897436) internal successors, (370), 312 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2022-11-03 03:49:57,439 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 143 [2022-11-03 03:49:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:57,439 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2022-11-03 03:49:57,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2022-11-03 03:49:57,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-03 03:49:57,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:57,443 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:57,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:57,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:49:57,669 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:57,669 INFO L85 PathProgramCache]: Analyzing trace with hash -398489307, now seen corresponding path program 8 times [2022-11-03 03:49:57,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:57,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022206147] [2022-11-03 03:49:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:57,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:57,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:57,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016604755] [2022-11-03 03:49:57,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:49:57,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:57,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:57,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:57,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:49:58,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:49:58,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:49:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:49:58,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16992 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16984 trivial. 0 not checked. [2022-11-03 03:49:58,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:49:58,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:58,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022206147] [2022-11-03 03:49:58,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:58,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016604755] [2022-11-03 03:49:58,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016604755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:49:58,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:49:58,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:49:58,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048080386] [2022-11-03 03:49:58,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:49:58,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:49:58,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:49:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:49:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:49:58,292 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:49:58,542 INFO L93 Difference]: Finished difference Result 493 states and 619 transitions. [2022-11-03 03:49:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:49:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 239 [2022-11-03 03:49:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:49:58,545 INFO L225 Difference]: With dead ends: 493 [2022-11-03 03:49:58,545 INFO L226 Difference]: Without dead ends: 390 [2022-11-03 03:49:58,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:49:58,546 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:49:58,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 11 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:49:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-03 03:49:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2022-11-03 03:49:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1841269841269841) internal successors, (373), 315 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 373 transitions. [2022-11-03 03:49:58,695 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 373 transitions. Word has length 239 [2022-11-03 03:49:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:49:58,695 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 373 transitions. [2022-11-03 03:49:58,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:49:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 373 transitions. [2022-11-03 03:49:58,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-03 03:49:58,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:49:58,699 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:49:58,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:49:58,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:49:58,925 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:49:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:49:58,925 INFO L85 PathProgramCache]: Analyzing trace with hash -442724687, now seen corresponding path program 9 times [2022-11-03 03:49:58,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:49:58,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299974716] [2022-11-03 03:49:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:49:58,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:49:59,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:49:59,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504661108] [2022-11-03 03:49:59,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:49:59,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:49:59,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:49:59,003 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:49:59,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:49:59,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:49:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:49:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:49:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:49:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2022-11-03 03:49:59,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:49:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2022-11-03 03:49:59,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:49:59,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299974716] [2022-11-03 03:49:59,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:49:59,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504661108] [2022-11-03 03:49:59,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504661108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:49:59,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033190108] [2022-11-03 03:49:59,417 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:49:59,418 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:49:59,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:49:59,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:49:59,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:49:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:59,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:59,501 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:49:59,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:49:59,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:59,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:59,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:49:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:59,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:49:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:59,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:49:59,831 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:49:59,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:50:00,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:00,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:00,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:00,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:00,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:00,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:00,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:00,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:00,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:00,572 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:00,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:00,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:00,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:00,734 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:50:00,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-03 03:50:00,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:00,808 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:00,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:00,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:00,883 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:00,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:00,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:00,924 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:00,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:00,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:00,993 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:00,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:01,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,098 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:50:01,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-03 03:50:01,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,196 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:01,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:01,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,278 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:01,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:01,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,400 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:50:01,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:50:01,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,489 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:01,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:01,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,622 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:50:01,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:50:01,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,767 INFO L356 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-03 03:50:01,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-03 03:50:01,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,897 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:01,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:01,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:01,945 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:01,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:02,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,021 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:02,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:02,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,067 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:02,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:02,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,113 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:02,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:02,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,182 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:50:02,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:50:02,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,340 INFO L356 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-03 03:50:02,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-03 03:50:02,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,451 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:02,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:02,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,498 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:02,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:02,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,558 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:02,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:02,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,694 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:50:02,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:50:02,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:02,760 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:02,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:02,768 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:50:08,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15354#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:50:08,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:50:08,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:08,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-03 03:50:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841497807] [2022-11-03 03:50:08,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:50:08,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:50:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:50:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:50:08,129 INFO L87 Difference]: Start difference. First operand 316 states and 373 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:08,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:08,640 INFO L93 Difference]: Finished difference Result 493 states and 641 transitions. [2022-11-03 03:50:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:50:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 245 [2022-11-03 03:50:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:08,642 INFO L225 Difference]: With dead ends: 493 [2022-11-03 03:50:08,642 INFO L226 Difference]: Without dead ends: 358 [2022-11-03 03:50:08,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 519 SyntacticMatches, 195 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:50:08,644 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:08,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:50:08,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-03 03:50:08,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 326. [2022-11-03 03:50:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1907692307692308) internal successors, (387), 325 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 387 transitions. [2022-11-03 03:50:08,778 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 387 transitions. Word has length 245 [2022-11-03 03:50:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:08,778 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 387 transitions. [2022-11-03 03:50:08,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 387 transitions. [2022-11-03 03:50:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-03 03:50:08,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:08,781 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:08,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:08,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:08,989 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:08,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:08,990 INFO L85 PathProgramCache]: Analyzing trace with hash -706577498, now seen corresponding path program 10 times [2022-11-03 03:50:08,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:08,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207444268] [2022-11-03 03:50:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:09,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:50:09,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482694209] [2022-11-03 03:50:09,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:50:09,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:09,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:09,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:09,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:50:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:50:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2022-11-03 03:50:10,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2022-11-03 03:50:11,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207444268] [2022-11-03 03:50:11,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:50:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482694209] [2022-11-03 03:50:11,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482694209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:11,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964083795] [2022-11-03 03:50:11,051 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:50:11,052 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:50:11,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:50:11,052 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:50:11,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:50:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:11,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:11,148 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:50:11,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:50:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:11,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:50:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:11,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:50:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:11,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:11,477 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:50:11,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:50:11,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:11,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:11,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:50:11,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:11,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:11,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:50:12,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:12,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:12,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,159 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:12,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:12,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,212 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:12,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-03 03:50:12,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,266 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:12,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:12,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,390 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:12,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:12,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,437 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:12,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,517 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:12,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:12,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,617 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:50:12,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-03 03:50:12,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,694 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:12,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:12,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,756 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:12,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:12,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,851 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:50:12,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:50:12,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:12,919 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:12,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,033 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:50:13,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:50:13,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,085 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:13,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,133 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:13,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,204 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:50:13,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:50:13,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,251 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:13,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,295 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:13,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,364 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:50:13,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:50:13,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,416 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:13,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,469 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:13,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,545 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:13,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,608 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:13,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:50:13,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:13,658 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:13,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:13,664 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:50:22,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18484#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:50:22,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:50:22,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:22,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-03 03:50:22,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372300007] [2022-11-03 03:50:22,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:50:22,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 03:50:22,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 03:50:22,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=2155, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 03:50:22,463 INFO L87 Difference]: Start difference. First operand 326 states and 387 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:26,975 INFO L93 Difference]: Finished difference Result 1739 states and 2543 transitions. [2022-11-03 03:50:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 03:50:26,976 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 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 250 [2022-11-03 03:50:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:26,981 INFO L225 Difference]: With dead ends: 1739 [2022-11-03 03:50:26,982 INFO L226 Difference]: Without dead ends: 1439 [2022-11-03 03:50:26,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 496 SyntacticMatches, 194 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15790 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2604, Invalid=4202, Unknown=0, NotChecked=0, Total=6806 [2022-11-03 03:50:26,984 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1720 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 1449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1449 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:26,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1720 Valid, 140 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1449 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 03:50:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-11-03 03:50:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 590. [2022-11-03 03:50:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.1460101867572157) internal successors, (675), 589 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 675 transitions. [2022-11-03 03:50:27,285 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 675 transitions. Word has length 250 [2022-11-03 03:50:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:27,286 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 675 transitions. [2022-11-03 03:50:27,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 675 transitions. [2022-11-03 03:50:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-11-03 03:50:27,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:27,288 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:27,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:27,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:50:27,489 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:27,489 INFO L85 PathProgramCache]: Analyzing trace with hash -612360282, now seen corresponding path program 11 times [2022-11-03 03:50:27,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:27,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504385956] [2022-11-03 03:50:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:27,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:27,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:50:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451673721] [2022-11-03 03:50:27,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:50:27,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:27,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:27,622 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:27,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:50:28,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:50:28,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:50:28,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:50:28,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 70718 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 70698 trivial. 0 not checked. [2022-11-03 03:50:28,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:50:28,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:28,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504385956] [2022-11-03 03:50:28,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:50:28,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451673721] [2022-11-03 03:50:28,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451673721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:50:28,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:50:28,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:50:28,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385463707] [2022-11-03 03:50:28,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:50:28,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:50:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:50:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:28,758 INFO L87 Difference]: Start difference. First operand 590 states and 675 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-11-03 03:50:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:29,097 INFO L93 Difference]: Finished difference Result 765 states and 911 transitions. [2022-11-03 03:50:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:50:29,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 442 [2022-11-03 03:50:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:29,101 INFO L225 Difference]: With dead ends: 765 [2022-11-03 03:50:29,101 INFO L226 Difference]: Without dead ends: 594 [2022-11-03 03:50:29,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:50:29,102 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:29,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 11 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:50:29,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-03 03:50:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2022-11-03 03:50:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.1440677966101696) internal successors, (675), 590 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 675 transitions. [2022-11-03 03:50:29,429 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 675 transitions. Word has length 442 [2022-11-03 03:50:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:29,429 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 675 transitions. [2022-11-03 03:50:29,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-11-03 03:50:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 675 transitions. [2022-11-03 03:50:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-11-03 03:50:29,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:29,433 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:29,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:29,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:50:29,634 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash -234018727, now seen corresponding path program 12 times [2022-11-03 03:50:29,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:29,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971685533] [2022-11-03 03:50:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:29,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:29,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:50:29,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633730624] [2022-11-03 03:50:29,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:50:29,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:29,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:29,771 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:29,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:50:30,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:50:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:50:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:50:30,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2022-11-03 03:50:30,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2022-11-03 03:50:30,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971685533] [2022-11-03 03:50:30,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:50:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633730624] [2022-11-03 03:50:30,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633730624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:30,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723920244] [2022-11-03 03:50:30,495 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:50:30,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:50:30,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:50:30,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:50:30,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:50:30,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:30,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:30,577 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:50:30,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:50:30,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:30,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:50:30,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:30,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:50:30,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:30,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:30,958 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:50:30,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:50:31,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:31,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:31,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:31,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:31,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:31,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:31,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:31,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:31,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:31,773 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:31,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:31,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:31,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:31,890 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:50:31,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-03 03:50:31,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:31,965 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:31,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,036 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,083 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,136 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,232 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,293 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:32,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-03 03:50:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,341 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,398 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:50:32,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:50:32,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,502 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:50:32,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-03 03:50:32,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,556 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,698 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,789 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:32,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-03 03:50:32,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,853 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,902 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:32,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:32,984 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:32,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:33,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,026 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:33,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:33,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,079 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:33,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:33,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,145 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:33,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:33,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,239 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:33,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:50:33,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,298 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:33,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:33,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,345 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:33,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:33,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,415 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:33,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:33,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,472 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:33,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:50:33,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:33,515 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:33,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:33,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:50:41,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29540#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:50:41,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:50:41,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:50:41,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-03 03:50:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332344809] [2022-11-03 03:50:41,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:50:41,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:50:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:50:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:50:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:50:41,965 INFO L87 Difference]: Start difference. First operand 591 states and 675 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:42,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:50:42,657 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2022-11-03 03:50:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:50:42,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 443 [2022-11-03 03:50:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:50:42,660 INFO L225 Difference]: With dead ends: 1003 [2022-11-03 03:50:42,660 INFO L226 Difference]: Without dead ends: 812 [2022-11-03 03:50:42,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 922 SyntacticMatches, 387 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:50:42,661 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:50:42,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:50:42,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-11-03 03:50:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 607. [2022-11-03 03:50:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.1485148514851484) internal successors, (696), 606 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 696 transitions. [2022-11-03 03:50:42,931 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 696 transitions. Word has length 443 [2022-11-03 03:50:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:50:42,931 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 696 transitions. [2022-11-03 03:50:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:50:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 696 transitions. [2022-11-03 03:50:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-11-03 03:50:42,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:50:42,934 INFO L195 NwaCegarLoop]: trace histogram [368, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:50:42,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:50:43,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:50:43,134 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:50:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:50:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1654232045, now seen corresponding path program 13 times [2022-11-03 03:50:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:50:43,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919286010] [2022-11-03 03:50:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:43,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:50:43,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:50:43,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872756835] [2022-11-03 03:50:43,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:50:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:50:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:50:43,267 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:50:43,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 03:50:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:44,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 3727 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 03:50:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2022-11-03 03:50:45,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2022-11-03 03:50:49,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:50:49,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919286010] [2022-11-03 03:50:49,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:50:49,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872756835] [2022-11-03 03:50:49,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872756835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:49,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181345984] [2022-11-03 03:50:49,960 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:50:49,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:50:49,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:50:49,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:50:49,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:50:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:49,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:50,026 INFO L356 Elim1Store]: treesize reduction 85, result has 29.2 percent of original size [2022-11-03 03:50:50,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 37 treesize of output 59 [2022-11-03 03:50:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:50,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:50,106 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:50:50,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:50:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:50,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 45 [2022-11-03 03:50:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:50,363 INFO L356 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-03 03:50:50,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 386 [2022-11-03 03:50:50,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:50,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:50,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:50:50,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:50,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:50,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:50,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:50,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:50:50,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:50,993 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:50,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,059 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:51,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-03 03:50:51,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,104 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,178 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,221 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,277 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,351 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,396 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:51,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-03 03:50:51,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,440 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,491 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,539 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:51,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:50:51,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,582 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,683 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:50:51,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:50:51,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,730 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,780 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,857 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:50:51,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:50:51,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,896 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:51,943 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:51,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:51,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:52,009 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:52,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:52,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:52,051 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:52,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:52,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:52,097 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:52,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:52,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:52,156 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:52,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:52,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:52,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:52,210 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:50:52,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:50:52,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:50:52,251 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:50:52,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:50:52,256 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:51:19,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35409#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:51:19,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:51:19,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:51:19,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2022-11-03 03:51:19,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723189960] [2022-11-03 03:51:19,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:51:19,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-03 03:51:19,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:51:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-03 03:51:19,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5009, Invalid=6547, Unknown=0, NotChecked=0, Total=11556 [2022-11-03 03:51:19,894 INFO L87 Difference]: Start difference. First operand 607 states and 696 transitions. Second operand has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:51:46,300 INFO L93 Difference]: Finished difference Result 4184 states and 6130 transitions. [2022-11-03 03:51:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-03 03:51:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 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 455 [2022-11-03 03:51:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:51:46,314 INFO L225 Difference]: With dead ends: 4184 [2022-11-03 03:51:46,314 INFO L226 Difference]: Without dead ends: 3627 [2022-11-03 03:51:46,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 868 SyntacticMatches, 389 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61969 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=9756, Invalid=14114, Unknown=0, NotChecked=0, Total=23870 [2022-11-03 03:51:46,322 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3035 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 1950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3035 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1950 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:51:46,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3035 Valid, 284 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1950 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 03:51:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-11-03 03:51:47,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1135. [2022-11-03 03:51:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.1216931216931216) internal successors, (1272), 1134 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1272 transitions. [2022-11-03 03:51:47,007 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1272 transitions. Word has length 455 [2022-11-03 03:51:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:51:47,008 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1272 transitions. [2022-11-03 03:51:47,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:51:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1272 transitions. [2022-11-03 03:51:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2022-11-03 03:51:47,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:51:47,018 INFO L195 NwaCegarLoop]: trace histogram [752, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:51:47,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:51:47,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:47,241 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:51:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:51:47,241 INFO L85 PathProgramCache]: Analyzing trace with hash 294079469, now seen corresponding path program 14 times [2022-11-03 03:51:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:51:47,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846495378] [2022-11-03 03:51:47,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:51:47,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:51:47,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:51:47,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283215480] [2022-11-03 03:51:47,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:51:47,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:51:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:51:47,505 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:51:47,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 03:51:48,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:51:48,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:51:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:51:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2022-11-03 03:51:52,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:51:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2022-11-03 03:51:58,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:51:58,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846495378] [2022-11-03 03:51:58,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:51:58,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283215480] [2022-11-03 03:51:58,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283215480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:51:58,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133615456] [2022-11-03 03:51:58,692 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:51:58,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:51:58,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:51:58,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:51:58,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:51:58,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:58,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:58,780 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:51:58,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:51:58,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:58,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:51:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:58,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:51:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:51:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:51:59,073 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:51:59,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:51:59,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:51:59,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:51:59,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:51:59,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:51:59,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:51:59,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:51:59,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:51:59,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:51:59,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:51:59,853 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:51:59,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:51:59,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:51:59,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:51:59,996 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:51:59,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-03 03:52:00,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,068 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:00,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,162 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:00,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,213 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:00,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,259 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:00,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,349 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:00,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,422 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:52:00,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-03 03:52:00,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,471 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:00,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,526 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:00,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,581 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:52:00,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:52:00,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,623 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:00,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,731 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:52:00,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:52:00,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,888 INFO L356 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-03 03:52:00,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-03 03:52:00,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:00,974 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:00,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,023 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,104 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,201 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,248 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,323 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,367 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,411 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,471 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,515 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:52:01,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:52:01,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:01,558 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:01,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:01,562 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:52:14,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50757#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:52:14,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:52:14,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:14,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-03 03:52:14,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27661877] [2022-11-03 03:52:14,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:14,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:52:14,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:14,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:52:14,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:52:14,371 INFO L87 Difference]: Start difference. First operand 1135 states and 1272 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:15,062 INFO L93 Difference]: Finished difference Result 1449 states and 1694 transitions. [2022-11-03 03:52:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:52:15,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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 839 [2022-11-03 03:52:15,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:15,067 INFO L225 Difference]: With dead ends: 1449 [2022-11-03 03:52:15,067 INFO L226 Difference]: Without dead ends: 1139 [2022-11-03 03:52:15,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2517 GetRequests, 1728 SyntacticMatches, 773 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3205 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:52:15,069 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:15,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:52:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-11-03 03:52:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1136. [2022-11-03 03:52:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.118942731277533) internal successors, (1270), 1135 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1270 transitions. [2022-11-03 03:52:15,801 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1270 transitions. Word has length 839 [2022-11-03 03:52:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:15,803 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1270 transitions. [2022-11-03 03:52:15,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1270 transitions. [2022-11-03 03:52:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2022-11-03 03:52:15,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:15,813 INFO L195 NwaCegarLoop]: trace histogram [752, 13, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:15,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:16,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:16,025 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 814504007, now seen corresponding path program 15 times [2022-11-03 03:52:16,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:16,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471700542] [2022-11-03 03:52:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:16,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:16,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:52:16,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939273040] [2022-11-03 03:52:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:52:16,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:16,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:16,277 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:16,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:52:17,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:52:17,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:52:17,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:52:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 164 proven. 30 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2022-11-03 03:52:17,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:52:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2022-11-03 03:52:18,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:52:18,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471700542] [2022-11-03 03:52:18,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:52:18,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939273040] [2022-11-03 03:52:18,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939273040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:52:18,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20043643] [2022-11-03 03:52:18,053 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:52:18,054 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:52:18,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:52:18,054 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:52:18,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:52:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:18,151 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:52:18,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:52:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:18,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:52:18,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:18,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 45 [2022-11-03 03:52:18,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:52:18,436 INFO L356 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-03 03:52:18,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 386 [2022-11-03 03:52:18,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:52:18,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:52:18,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:52:18,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:52:18,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:52:18,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:52:19,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:52:19,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:52:19,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,173 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:52:19,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:52:19,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,304 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:52:19,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-03 03:52:19,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,415 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:19,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:19,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,511 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:19,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,566 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:19,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:19,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,625 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:19,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:19,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,708 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:19,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:19,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,758 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:52:19,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-03 03:52:19,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,806 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:19,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:19,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,864 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:19,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:19,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,918 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:52:19,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:52:19,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:19,961 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:19,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,076 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:20,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,197 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:52:20,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-03 03:52:20,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,267 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:20,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,321 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:20,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,413 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:52:20,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:52:20,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,463 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:20,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,512 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:20,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,587 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:52:20,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:52:20,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,636 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:20,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,687 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:20,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,763 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:52:20,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:52:20,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,899 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:52:20,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-03 03:52:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:52:20,991 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:52:20,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:52:20,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:52:43,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60722#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:52:43,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:52:43,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:52:43,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-03 03:52:43,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656732869] [2022-11-03 03:52:43,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:52:43,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 03:52:43,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:52:43,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 03:52:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:52:43,408 INFO L87 Difference]: Start difference. First operand 1136 states and 1270 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:52:45,289 INFO L93 Difference]: Finished difference Result 1567 states and 1858 transitions. [2022-11-03 03:52:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:52:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 844 [2022-11-03 03:52:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:52:45,297 INFO L225 Difference]: With dead ends: 1567 [2022-11-03 03:52:45,297 INFO L226 Difference]: Without dead ends: 1198 [2022-11-03 03:52:45,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2547 GetRequests, 1733 SyntacticMatches, 774 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10621 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=401, Invalid=1321, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:52:45,299 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:52:45,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 36 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:52:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-11-03 03:52:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1161. [2022-11-03 03:52:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 1.1267241379310344) internal successors, (1307), 1160 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1307 transitions. [2022-11-03 03:52:46,089 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1307 transitions. Word has length 844 [2022-11-03 03:52:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:52:46,090 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1307 transitions. [2022-11-03 03:52:46,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:52:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1307 transitions. [2022-11-03 03:52:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2022-11-03 03:52:46,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:52:46,100 INFO L195 NwaCegarLoop]: trace histogram [752, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:52:46,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:52:46,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 03:52:46,317 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:52:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:52:46,317 INFO L85 PathProgramCache]: Analyzing trace with hash -937638281, now seen corresponding path program 16 times [2022-11-03 03:52:46,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:52:46,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434084498] [2022-11-03 03:52:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:52:46,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:52:46,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 03:52:46,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478508837] [2022-11-03 03:52:46,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:52:46,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:52:46,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:52:46,633 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:52:46,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 03:52:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:52:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 7246 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-03 03:52:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:52:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2022-11-03 03:52:54,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2022-11-03 03:54:28,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:54:28,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434084498] [2022-11-03 03:54:28,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 03:54:28,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478508837] [2022-11-03 03:54:28,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478508837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:28,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112671686] [2022-11-03 03:54:28,720 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 03:54:28,720 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:54:28,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:54:28,721 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:54:28,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:54:28,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:28,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:28,828 INFO L356 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-03 03:54:28,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-03 03:54:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:28,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:28,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 45 [2022-11-03 03:54:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:28,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2022-11-03 03:54:29,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:54:29,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:29,146 INFO L356 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-03 03:54:29,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 388 [2022-11-03 03:54:29,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:54:29,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:54:29,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:54:29,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:54:29,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:54:29,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-03 03:54:29,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:54:29,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-03 03:54:29,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:29,932 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:29,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:29,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:29,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:29,991 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:54:29,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-03 03:54:30,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,036 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:30,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:30,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,118 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:54:30,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:54:30,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,162 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:30,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:30,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,235 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:54:30,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:54:30,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,361 INFO L356 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-03 03:54:30,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-03 03:54:30,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,438 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:30,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:30,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,488 INFO L356 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-03 03:54:30,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:54:30,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,630 INFO L356 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-03 03:54:30,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-03 03:54:30,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,703 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:30,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:30,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,819 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:54:30,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:54:30,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,876 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:30,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:30,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:30,925 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:30,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:30,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,009 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:31,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:31,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,120 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:54:31,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-03 03:54:31,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,208 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:31,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,256 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:31,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:31,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,332 INFO L356 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-03 03:54:31,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 47 [2022-11-03 03:54:31,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,531 INFO L356 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-03 03:54:31,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-03 03:54:31,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,657 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:31,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:31,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,702 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:31,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:31,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,780 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:31,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:31,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,841 INFO L356 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-03 03:54:31,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-03 03:54:31,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:54:31,890 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-03 03:54:31,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 49 treesize of output 49 [2022-11-03 03:54:31,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:56:21,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71202#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-03 03:56:21,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:56:21,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:56:21,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2022-11-03 03:56:21,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403682552] [2022-11-03 03:56:21,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:21,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-03 03:56:21,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:21,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-03 03:56:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19169, Invalid=22243, Unknown=0, NotChecked=0, Total=41412 [2022-11-03 03:56:21,835 INFO L87 Difference]: Start difference. First operand 1161 states and 1307 transitions. Second operand has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:00,755 INFO L93 Difference]: Finished difference Result 9848 states and 14847 transitions. [2022-11-03 04:02:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-03 04:02:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 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 848 [2022-11-03 04:02:00,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:00,783 INFO L225 Difference]: With dead ends: 9848 [2022-11-03 04:02:00,783 INFO L226 Difference]: Without dead ends: 8785 [2022-11-03 04:02:00,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2637 GetRequests, 1567 SyntacticMatches, 773 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243745 ImplicationChecksByTransitivity, 417.0s TimeCoverageRelationStatistics Valid=37884, Invalid=51218, Unknown=0, NotChecked=0, Total=89102 [2022-11-03 04:02:00,795 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6873 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 3682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6873 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 5321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3682 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:00,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6873 Valid, 572 Invalid, 5321 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3682 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2022-11-03 04:02:00,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2022-11-03 04:02:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 2217. [2022-11-03 04:02:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.1096570397111913) internal successors, (2459), 2216 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2459 transitions. [2022-11-03 04:02:02,202 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2459 transitions. Word has length 848 [2022-11-03 04:02:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:02,202 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 2459 transitions. [2022-11-03 04:02:02,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2459 transitions. [2022-11-03 04:02:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2022-11-03 04:02:02,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:02,232 INFO L195 NwaCegarLoop]: trace histogram [1520, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:02,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:02,433 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1171215991, now seen corresponding path program 17 times [2022-11-03 04:02:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:02,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902369981] [2022-11-03 04:02:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:02,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 04:02:02,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380940263] [2022-11-03 04:02:02,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:02:02,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:02,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:02,977 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:02,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3a18d9-9fd9-4f69-ad1f-a0ff16aa57c4/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process