./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh --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 cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 --- 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-2329fc7 [2022-12-14 12:30:22,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:30:22,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:30:22,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:30:22,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:30:22,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:30:22,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:30:22,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:30:22,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:30:22,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:30:22,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:30:22,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:30:22,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:30:22,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:30:22,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:30:22,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:30:22,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:30:22,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:30:22,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:30:22,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:30:22,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:30:22,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:30:22,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:30:23,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:30:23,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:30:23,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:30:23,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:30:23,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:30:23,005 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:30:23,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:30:23,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:30:23,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:30:23,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:30:23,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:30:23,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:30:23,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:30:23,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:30:23,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:30:23,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:30:23,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:30:23,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:30:23,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:30:23,032 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:30:23,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:30:23,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:30:23,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:30:23,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:30:23,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:30:23,034 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:30:23,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:30:23,034 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:30:23,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:30:23,035 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:30:23,043 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:30:23,043 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:30:23,043 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:30:23,043 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:30:23,043 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:30:23,044 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:30:23,044 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:30:23,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:30:23,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:30:23,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:30:23,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:30:23,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:30:23,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:30:23,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:30:23,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:30:23,046 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:30:23,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:30:23,046 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:30:23,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:30:23,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:30:23,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:30:23,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:30:23,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:30:23,048 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:30:23,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:30:23,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:30:23,048 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:30:23,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:30:23,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:30:23,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:30:23,048 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_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb671fec0d42514b04873418e954f5a2df95ef7f393045434a478c03667a31d2 [2022-12-14 12:30:23,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:30:23,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:30:23,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:30:23,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:30:23,254 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:30:23,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/ss4.c [2022-12-14 12:30:25,867 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:30:25,982 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:30:25,983 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/sv-benchmarks/c/array-fpi/ss4.c [2022-12-14 12:30:25,987 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/data/d9feefb80/7f18438c4d614d8bab853d27483a086b/FLAG4d9e2cf32 [2022-12-14 12:30:25,998 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/data/d9feefb80/7f18438c4d614d8bab853d27483a086b [2022-12-14 12:30:26,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:30:26,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:30:26,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:30:26,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:30:26,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:30:26,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:30:25" (1/1) ... [2022-12-14 12:30:26,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132dca42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26, skipping insertion in model container [2022-12-14 12:30:26,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:30:25" (1/1) ... [2022-12-14 12:30:26,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:30:26,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:30:26,124 WARN L237 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_f1db172d-b647-4fa8-b941-3e1d47237468/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2022-12-14 12:30:26,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:30:26,146 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:30:26,156 WARN L237 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_f1db172d-b647-4fa8-b941-3e1d47237468/sv-benchmarks/c/array-fpi/ss4.c[586,599] [2022-12-14 12:30:26,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:30:26,172 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:30:26,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26 WrapperNode [2022-12-14 12:30:26,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:30:26,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:30:26,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:30:26,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:30:26,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,199 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2022-12-14 12:30:26,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:30:26,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:30:26,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:30:26,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:30:26,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:30:26,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:30:26,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:30:26,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:30:26,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (1/1) ... [2022-12-14 12:30:26,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:30:26,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:26,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:30:26,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:30:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:30:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:30:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:30:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:30:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:30:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:30:26,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:30:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:30:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:30:26,355 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:30:26,357 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:30:26,484 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:30:26,514 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:30:26,514 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 12:30:26,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:30:26 BoogieIcfgContainer [2022-12-14 12:30:26,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:30:26,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:30:26,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:30:26,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:30:26,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:30:25" (1/3) ... [2022-12-14 12:30:26,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542bc2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:30:26, skipping insertion in model container [2022-12-14 12:30:26,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:30:26" (2/3) ... [2022-12-14 12:30:26,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542bc2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:30:26, skipping insertion in model container [2022-12-14 12:30:26,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:30:26" (3/3) ... [2022-12-14 12:30:26,523 INFO L112 eAbstractionObserver]: Analyzing ICFG ss4.c [2022-12-14 12:30:26,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:30:26,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:30:26,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:30:26,582 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;@d7e4e45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:30:26,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:30:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:26,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:30:26,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:26,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:26,593 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash -228288665, now seen corresponding path program 1 times [2022-12-14 12:30:26,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:26,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678399549] [2022-12-14 12:30:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:26,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:26,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678399549] [2022-12-14 12:30:26,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 12:30:26,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783058279] [2022-12-14 12:30:26,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:26,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:26,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:26,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:30:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:26,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:30:26,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:26,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:30:26,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:30:26,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783058279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:30:26,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:30:26,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:30:26,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785033442] [2022-12-14 12:30:26,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:30:26,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:30:26,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:30:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:30:26,899 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:26,939 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-12-14 12:30:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:30:26,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 12:30:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:26,947 INFO L225 Difference]: With dead ends: 22 [2022-12-14 12:30:26,947 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 12:30:26,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:30:26,952 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:26,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:30:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 12:30:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 12:30:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-12-14 12:30:26,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-12-14 12:30:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:26,976 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-12-14 12:30:26,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-12-14 12:30:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:30:26,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:26,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:26,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:30:27,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:27,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1111661393, now seen corresponding path program 1 times [2022-12-14 12:30:27,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:27,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824836832] [2022-12-14 12:30:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:27,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:27,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:27,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874199456] [2022-12-14 12:30:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:27,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:27,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:27,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:27,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:30:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:30:27,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:30:27,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:30:27,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:27,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824836832] [2022-12-14 12:30:27,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:27,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874199456] [2022-12-14 12:30:27,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874199456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:30:27,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:30:27,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:30:27,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240126785] [2022-12-14 12:30:27,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:30:27,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:30:27,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:30:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:30:27,283 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-12-14 12:30:27,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:27,314 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-12-14 12:30:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:30:27,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2022-12-14 12:30:27,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:27,315 INFO L225 Difference]: With dead ends: 18 [2022-12-14 12:30:27,315 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 12:30:27,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:30:27,316 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:27,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:30:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 12:30:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 12:30:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-12-14 12:30:27,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-12-14 12:30:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:27,320 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-12-14 12:30:27,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-12-14 12:30:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-12-14 12:30:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:30:27,321 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:27,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:27,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 12:30:27,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 12:30:27,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1860477013, now seen corresponding path program 1 times [2022-12-14 12:30:27,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:27,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888497710] [2022-12-14 12:30:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:27,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:27,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:27,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397072117] [2022-12-14 12:30:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:27,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:27,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:30:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:27,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 12:30:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:27,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:30:27,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:27,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 12:30:27,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 12:30:27,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 12:30:27,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-12-14 12:30:28,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 12:30:28,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2022-12-14 12:30:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:30:28,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:30:30,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888497710] [2022-12-14 12:30:30,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397072117] [2022-12-14 12:30:30,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397072117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908279590] [2022-12-14 12:30:30,565 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:30:30,566 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:30,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:30,573 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:30,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,622 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:30:30,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 12:30:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,696 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:30:30,697 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:30:30,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,719 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 39 [2022-12-14 12:30:30,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 12:30:30,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:30,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:30,922 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 12:30:30,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 12:30:30,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:30:31,025 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:31,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:30:31,087 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:31,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:31,147 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:31,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 12:30:31,219 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:30:31,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:30:31,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:31,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:31,273 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:30:31,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 12:30:31,324 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:31,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:31,345 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:31,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '249#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:30:31,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:31,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:30:31,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-12-14 12:30:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493203412] [2022-12-14 12:30:31,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:30:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:30:31,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=479, Unknown=1, NotChecked=0, Total=552 [2022-12-14 12:30:31,937 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:34,729 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-12-14 12:30:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:30:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 12:30:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:34,731 INFO L225 Difference]: With dead ends: 35 [2022-12-14 12:30:34,731 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 12:30:34,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=103, Invalid=708, Unknown=1, NotChecked=0, Total=812 [2022-12-14 12:30:34,732 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:34,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:30:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 12:30:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-12-14 12:30:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-12-14 12:30:34,736 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-12-14 12:30:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:34,737 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-12-14 12:30:34,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-12-14 12:30:34,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:30:34,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:34,738 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:34,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:30:34,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:34,939 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:34,941 INFO L85 PathProgramCache]: Analyzing trace with hash -689266881, now seen corresponding path program 2 times [2022-12-14 12:30:34,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:34,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249585880] [2022-12-14 12:30:34,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:34,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:34,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:34,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395128793] [2022-12-14 12:30:34,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:30:34,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:34,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:34,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:34,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:30:35,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:30:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:30:35,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:30:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:30:35,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:30:35,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:35,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249585880] [2022-12-14 12:30:35,102 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:35,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395128793] [2022-12-14 12:30:35,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395128793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:35,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650851388] [2022-12-14 12:30:35,106 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:30:35,106 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:35,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:35,106 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:35,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,185 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 12:30:35,185 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 57 [2022-12-14 12:30:35,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,215 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:30:35,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 12:30:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,297 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:30:35,297 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:30:35,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:30:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:35,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:35,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:35,516 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:30:35,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:30:35,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:30:35,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:35,667 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:35,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:30:35,729 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:35,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:35,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:35,773 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:35,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:30:35,821 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:30:35,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:30:35,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:35,855 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 12:30:35,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 12:30:35,905 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:35,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:35,959 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:35,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:35,972 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:36,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '432#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:30:36,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:36,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:30:36,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 12:30:36,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183546686] [2022-12-14 12:30:36,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:36,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:30:36,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:30:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:30:36,172 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:36,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:36,263 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2022-12-14 12:30:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:30:36,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 12:30:36,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:36,264 INFO L225 Difference]: With dead ends: 31 [2022-12-14 12:30:36,264 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 12:30:36,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:30:36,265 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:36,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:30:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 12:30:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-12-14 12:30:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 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) [2022-12-14 12:30:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-12-14 12:30:36,273 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 13 [2022-12-14 12:30:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:36,273 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-12-14 12:30:36,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-12-14 12:30:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 12:30:36,274 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:36,274 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:36,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:30:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:36,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1839906970, now seen corresponding path program 3 times [2022-12-14 12:30:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:36,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858836470] [2022-12-14 12:30:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:36,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:36,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:36,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686790940] [2022-12-14 12:30:36,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:30:36,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:36,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:36,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:36,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:30:36,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:30:36,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:30:36,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:30:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:30:36,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:30:36,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:36,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858836470] [2022-12-14 12:30:36,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:36,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686790940] [2022-12-14 12:30:36,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686790940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:36,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797456380] [2022-12-14 12:30:36,608 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:30:36,608 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:36,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:36,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:36,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,634 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:30:36,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 12:30:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,695 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:30:36,695 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:30:36,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,711 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 39 [2022-12-14 12:30:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:30:36,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:36,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:36,868 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:30:36,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:30:36,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:30:37,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:37,025 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 12:30:37,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:30:37,082 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:37,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:37,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:37,139 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:37,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 12:30:37,195 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:30:37,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:30:37,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:37,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:37,245 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 12:30:37,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 12:30:37,300 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:37,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:37,318 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:37,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '616#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:30:37,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:37,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:30:37,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-12-14 12:30:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824815840] [2022-12-14 12:30:37,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:37,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:30:37,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:30:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:30:37,539 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:37,593 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-12-14 12:30:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:30:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 12:30:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:37,594 INFO L225 Difference]: With dead ends: 33 [2022-12-14 12:30:37,594 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 12:30:37,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:30:37,595 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:37,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:30:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 12:30:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 12:30:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-12-14 12:30:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-12-14 12:30:37,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2022-12-14 12:30:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:37,600 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-12-14 12:30:37,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-12-14 12:30:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 12:30:37,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:37,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:37,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:30:37,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:37,801 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:37,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:37,802 INFO L85 PathProgramCache]: Analyzing trace with hash 664323303, now seen corresponding path program 4 times [2022-12-14 12:30:37,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:37,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074090952] [2022-12-14 12:30:37,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:37,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:37,834 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:37,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040096077] [2022-12-14 12:30:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:30:37,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:37,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:30:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:37,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 12:30:37,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:37,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:37,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:30:37,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 12:30:37,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:37,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 12:30:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:37,986 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 45 treesize of output 35 [2022-12-14 12:30:38,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:38,010 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 51 treesize of output 35 [2022-12-14 12:30:38,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:38,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:38,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 44 [2022-12-14 12:30:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:38,080 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 61 treesize of output 39 [2022-12-14 12:30:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:38,107 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 57 treesize of output 41 [2022-12-14 12:30:38,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:38,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:38,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 44 [2022-12-14 12:30:38,178 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 55 treesize of output 37 [2022-12-14 12:30:38,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 44 [2022-12-14 12:30:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:30:38,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:30:42,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:42,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074090952] [2022-12-14 12:30:42,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:42,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040096077] [2022-12-14 12:30:42,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040096077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:42,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1858157921] [2022-12-14 12:30:42,979 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:30:42,980 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:42,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:42,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:42,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:43,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,045 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 12:30:43,045 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 57 [2022-12-14 12:30:43,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,069 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:30:43,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 12:30:43,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,133 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:30:43,134 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:30:43,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:30:43,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:43,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:43,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:43,257 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:30:43,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:30:43,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:30:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:43,375 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 12:30:43,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:30:43,426 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:43,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:43,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:43,466 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:43,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:30:43,510 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:30:43,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:30:43,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:43,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:43,543 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:30:43,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 12:30:43,590 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:43,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:43,648 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:43,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:43,662 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:44,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '829#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:30:44,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:44,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:30:44,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-12-14 12:30:44,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103862151] [2022-12-14 12:30:44,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:44,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 12:30:44,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 12:30:44,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:30:44,280 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2022-12-14 12:30:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:49,253 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-12-14 12:30:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 12:30:49,253 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) Word has length 16 [2022-12-14 12:30:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:49,254 INFO L225 Difference]: With dead ends: 37 [2022-12-14 12:30:49,254 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 12:30:49,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 12:30:49,255 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:49,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 41 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 12:30:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 12:30:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2022-12-14 12:30:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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) [2022-12-14 12:30:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-12-14 12:30:49,262 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2022-12-14 12:30:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:49,262 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-12-14 12:30:49,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2022-12-14 12:30:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-12-14 12:30:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:30:49,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:49,262 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:49,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:30:49,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 12:30:49,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash -881119672, now seen corresponding path program 5 times [2022-12-14 12:30:49,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:49,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863066470] [2022-12-14 12:30:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:49,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:49,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:49,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661125706] [2022-12-14 12:30:49,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:30:49,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:49,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:49,517 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:49,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:30:49,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:30:49,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:30:49,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:30:49,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:30:49,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:30:49,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863066470] [2022-12-14 12:30:49,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661125706] [2022-12-14 12:30:49,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661125706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393609420] [2022-12-14 12:30:49,650 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:30:49,651 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:49,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:49,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:49,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:49,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,712 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 12:30:49,712 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 57 [2022-12-14 12:30:49,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,734 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:30:49,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 12:30:49,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,805 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:30:49,805 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:30:49,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:30:49,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:49,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:49,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:49,931 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:30:49,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:30:49,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:30:50,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:50,037 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 12:30:50,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:30:50,085 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:50,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:50,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:50,123 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:50,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 12:30:50,168 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:30:50,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:30:50,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:50,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:50,208 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 12:30:50,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 12:30:50,255 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:50,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:50,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:50,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1058#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:30:50,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:50,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:30:50,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 12:30:50,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364582664] [2022-12-14 12:30:50,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:30:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:30:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:30:50,498 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-12-14 12:30:50,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:50,590 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-12-14 12:30:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:30:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 17 [2022-12-14 12:30:50,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:50,590 INFO L225 Difference]: With dead ends: 52 [2022-12-14 12:30:50,590 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 12:30:50,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:30:50,591 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:50,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 12 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:30:50,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 12:30:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2022-12-14 12:30:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2022-12-14 12:30:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 12:30:50,599 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 17 [2022-12-14 12:30:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:50,599 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 12:30:50,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-12-14 12:30:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 12:30:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 12:30:50,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:50,600 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:50,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:30:50,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:50,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash -231139271, now seen corresponding path program 6 times [2022-12-14 12:30:50,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:50,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065545992] [2022-12-14 12:30:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:50,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:50,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436211313] [2022-12-14 12:30:50,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:30:50,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:50,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:50,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:30:50,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:30:50,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:30:50,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:30:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:30:50,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:30:50,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065545992] [2022-12-14 12:30:50,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:30:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436211313] [2022-12-14 12:30:50,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436211313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038907396] [2022-12-14 12:30:50,986 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:30:50,986 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:50,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:50,986 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:50,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:51,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,045 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 12:30:51,045 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 57 [2022-12-14 12:30:51,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,096 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:30:51,096 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:30:51,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 12:30:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:30:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:51,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:51,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:51,249 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:30:51,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:30:51,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:30:51,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:51,357 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:51,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:30:51,412 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:51,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:51,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:51,464 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:30:51,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 12:30:51,519 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:30:51,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:30:51,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:51,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:51,564 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:30:51,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 12:30:51,621 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:30:51,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:30:51,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:51,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1315#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:30:51,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:30:51,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:30:51,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 12:30:51,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891395587] [2022-12-14 12:30:51,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:30:51,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 12:30:51,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 12:30:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:30:51,862 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-12-14 12:30:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:51,950 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-12-14 12:30:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:30:51,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 18 [2022-12-14 12:30:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:51,951 INFO L225 Difference]: With dead ends: 27 [2022-12-14 12:30:51,951 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 12:30:51,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:30:51,952 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:51,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:30:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 12:30:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 12:30:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:30:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 12:30:51,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2022-12-14 12:30:51,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:51,957 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 12:30:51,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-12-14 12:30:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 12:30:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 12:30:51,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:51,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:51,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 12:30:52,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 12:30:52,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash 449636693, now seen corresponding path program 7 times [2022-12-14 12:30:52,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:52,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781166442] [2022-12-14 12:30:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:52,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:52,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:30:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661561992] [2022-12-14 12:30:52,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:30:52,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:52,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:52,223 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:52,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:30:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:52,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 12:30:52,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:52,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:30:52,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:30:52,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 12:30:52,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 12:30:52,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,371 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 37 treesize of output 42 [2022-12-14 12:30:52,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-12-14 12:30:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:52,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 50 [2022-12-14 12:30:52,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2022-12-14 12:30:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 52 [2022-12-14 12:30:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 54 [2022-12-14 12:30:52,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 53 [2022-12-14 12:30:52,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 51 [2022-12-14 12:30:52,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-12-14 12:30:52,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:52,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 55 [2022-12-14 12:30:52,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2022-12-14 12:30:53,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 12:30:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:30:53,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:32:13,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781166442] [2022-12-14 12:32:13,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:32:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661561992] [2022-12-14 12:32:13,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661561992] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:32:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312970061] [2022-12-14 12:32:13,804 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:32:13,804 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:32:13,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:32:13,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:32:13,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:32:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:13,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:13,878 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 12:32:13,878 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 57 [2022-12-14 12:32:13,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:13,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:13,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:13,941 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:32:13,942 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:32:13,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:13,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 12:32:14,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 12:32:14,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:14,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,120 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 12:32:14,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 12:32:14,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:32:14,190 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:32:14,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:32:14,239 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:32:14,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:32:14,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:14,289 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:32:14,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 12:32:14,346 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:32:14,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:32:14,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:32:14,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:14,399 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 12:32:14,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 12:32:14,453 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:32:14,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:32:14,477 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:18,236 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1563#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:32:18,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:32:18,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:32:18,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-12-14 12:32:18,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614886348] [2022-12-14 12:32:18,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:32:18,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 12:32:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 12:32:18,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1423, Unknown=14, NotChecked=0, Total=1560 [2022-12-14 12:32:18,238 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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) [2022-12-14 12:33:15,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 12:33:17,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:33:20,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:33:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:33:23,713 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-12-14 12:33:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:33:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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 20 [2022-12-14 12:33:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:33:23,714 INFO L225 Difference]: With dead ends: 53 [2022-12-14 12:33:23,714 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 12:33:23,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 130.0s TimeCoverageRelationStatistics Valid=187, Invalid=2051, Unknown=18, NotChecked=0, Total=2256 [2022-12-14 12:33:23,715 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:33:23,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 482 Invalid, 1 Unknown, 0 Unchecked, 19.0s Time] [2022-12-14 12:33:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 12:33:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-12-14 12:33:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 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) [2022-12-14 12:33:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-12-14 12:33:23,727 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2022-12-14 12:33:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:33:23,727 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-12-14 12:33:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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) [2022-12-14 12:33:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-12-14 12:33:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:33:23,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:33:23,728 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:33:23,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:33:23,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:23,929 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:33:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:33:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash 444751423, now seen corresponding path program 8 times [2022-12-14 12:33:23,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:33:23,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290593472] [2022-12-14 12:33:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:33:23,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:33:23,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:33:23,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332988488] [2022-12-14 12:33:23,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:33:23,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:23,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:33:23,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:33:23,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:33:24,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:33:24,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:33:24,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:33:24,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:33:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:33:24,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:33:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:33:24,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:33:24,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290593472] [2022-12-14 12:33:24,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:33:24,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332988488] [2022-12-14 12:33:24,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332988488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:33:24,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543910136] [2022-12-14 12:33:24,196 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:33:24,197 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:33:24,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:33:24,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:33:24,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:33:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,259 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:33:24,259 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:33:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,273 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 39 [2022-12-14 12:33:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 12:33:24,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 12:33:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:24,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:24,419 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 12:33:24,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 12:33:24,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:33:24,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:24,510 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 12:33:24,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:33:24,554 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:33:24,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:33:24,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:24,601 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:33:24,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:33:24,647 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:33:24,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:33:24,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:33:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:24,678 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:33:24,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 12:33:24,719 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:33:24,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:33:24,764 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:33:24,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:33:24,775 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:33:24,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1866#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:33:24,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:33:24,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:33:24,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 12:33:24,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767768889] [2022-12-14 12:33:24,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:33:24,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:33:24,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:33:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:33:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:33:24,993 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:33:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:33:25,186 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-12-14 12:33:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:33:25,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 12:33:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:33:25,187 INFO L225 Difference]: With dead ends: 51 [2022-12-14 12:33:25,187 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 12:33:25,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:33:25,188 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:33:25,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:33:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 12:33:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-12-14 12:33:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 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) [2022-12-14 12:33:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-12-14 12:33:25,207 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2022-12-14 12:33:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:33:25,207 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-12-14 12:33:25,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:33:25,207 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-12-14 12:33:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 12:33:25,208 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:33:25,208 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:33:25,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:33:25,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:25,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:33:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:33:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1053530010, now seen corresponding path program 9 times [2022-12-14 12:33:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:33:25,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987412102] [2022-12-14 12:33:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:33:25,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:33:25,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:33:25,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185755330] [2022-12-14 12:33:25,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:33:25,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:33:25,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:33:25,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:33:25,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:33:25,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:33:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:33:25,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:33:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:33:25,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:33:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:33:25,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:33:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987412102] [2022-12-14 12:33:25,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:33:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185755330] [2022-12-14 12:33:25,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185755330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:33:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861333499] [2022-12-14 12:33:25,609 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:33:25,609 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:33:25,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:33:25,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:33:25,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:33:25,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,633 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 12:33:25,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-12-14 12:33:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,692 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-12-14 12:33:25,692 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 57 [2022-12-14 12:33:25,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,750 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:33:25,750 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:33:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:33:25,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:25,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:25,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:25,875 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:33:25,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:33:25,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:33:26,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:26,016 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 12:33:26,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:33:26,065 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:33:26,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:33:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:26,112 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:33:26,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:33:26,160 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:33:26,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:33:26,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:33:26,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:26,194 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:33:26,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 33 [2022-12-14 12:33:26,244 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:33:26,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:33:26,291 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:33:26,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:33:26,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:33:26,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2172#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:33:26,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:33:26,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:33:26,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 12:33:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983081281] [2022-12-14 12:33:26,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:33:26,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:33:26,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:33:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:33:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:33:26,539 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:33:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:33:26,659 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-12-14 12:33:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:33:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 12:33:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:33:26,660 INFO L225 Difference]: With dead ends: 51 [2022-12-14 12:33:26,660 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 12:33:26,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-12-14 12:33:26,661 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:33:26,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:33:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 12:33:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 12:33:26,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:33:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-12-14 12:33:26,671 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-12-14 12:33:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:33:26,671 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-12-14 12:33:26,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:33:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-12-14 12:33:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 12:33:26,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:33:26,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:33:26,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:33:26,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:26,873 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:33:26,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:33:26,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1463476839, now seen corresponding path program 10 times [2022-12-14 12:33:26,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:33:26,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082838857] [2022-12-14 12:33:26,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:33:26,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:33:26,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:33:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343660105] [2022-12-14 12:33:26,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:33:26,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:26,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:33:26,934 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:33:26,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:33:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:33:27,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-14 12:33:27,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:33:27,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:33:27,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 12:33:27,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 12:33:27,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 12:33:27,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,114 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 37 treesize of output 42 [2022-12-14 12:33:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-12-14 12:33:27,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:27,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2022-12-14 12:33:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:27,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 67 [2022-12-14 12:33:27,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 63 [2022-12-14 12:33:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-12-14 12:33:27,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-12-14 12:33:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 67 [2022-12-14 12:33:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 61 [2022-12-14 12:33:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-12-14 12:33:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-12-14 12:33:27,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-12-14 12:33:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-12-14 12:33:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:33:27,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:27,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-12-14 12:33:28,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-12-14 12:33:28,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 45 [2022-12-14 12:33:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:33:28,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:37:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:37:31,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:37:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082838857] [2022-12-14 12:37:31,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:37:31,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343660105] [2022-12-14 12:37:31,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343660105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:37:31,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132713200] [2022-12-14 12:37:31,401 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:37:31,402 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:37:31,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:37:31,402 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:37:31,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:37:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,468 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:37:31,468 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:37:31,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 12:37:31,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,500 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 39 [2022-12-14 12:37:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:37:31,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:37:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:37:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:37:31,641 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:37:31,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:37:31,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:37:31,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:37:31,744 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:37:31,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:37:31,799 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:37:31,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:37:31,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:37:31,844 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:37:31,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 12:37:31,897 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:37:31,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:37:31,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:37:31,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:37:31,937 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 12:37:31,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 12:37:31,991 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:37:31,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:37:32,008 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:37:35,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2505#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:37:35,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:37:35,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:37:35,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-12-14 12:37:35,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921891277] [2022-12-14 12:37:35,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:37:35,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 12:37:35,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:37:35,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 12:37:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2065, Unknown=40, NotChecked=0, Total=2256 [2022-12-14 12:37:35,521 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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) [2022-12-14 12:38:20,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:38:23,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:38:24,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 12:38:26,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 12:38:28,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:38:30,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 12:38:33,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:38:36,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:39:25,365 WARN L233 SmtUtils]: Spent 14.02s on a formula simplification. DAG size of input: 184 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:39:30,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:40:03,021 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 157 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:40:58,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:41:01,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:41:31,117 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 173 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:41:33,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:41:37,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:41:43,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-14 12:42:01,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:42:02,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:42:05,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 12:42:07,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 12:42:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:42:07,333 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-12-14 12:42:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 12:42:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 [2022-12-14 12:42:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:42:07,341 INFO L225 Difference]: With dead ends: 62 [2022-12-14 12:42:07,341 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 12:42:07,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 442.2s TimeCoverageRelationStatistics Valid=230, Invalid=2896, Unknown=66, NotChecked=0, Total=3192 [2022-12-14 12:42:07,342 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 25 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:42:07,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 127 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 856 Invalid, 12 Unknown, 0 Unchecked, 69.8s Time] [2022-12-14 12:42:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 12:42:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2022-12-14 12:42:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 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) [2022-12-14 12:42:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-14 12:42:07,358 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 24 [2022-12-14 12:42:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:42:07,358 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-14 12:42:07,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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) [2022-12-14 12:42:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-14 12:42:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:42:07,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:42:07,359 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:42:07,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:42:07,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:42:07,560 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:42:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:42:07,561 INFO L85 PathProgramCache]: Analyzing trace with hash -470298031, now seen corresponding path program 11 times [2022-12-14 12:42:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:42:07,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844968605] [2022-12-14 12:42:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:42:07,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:42:07,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:42:07,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184278747] [2022-12-14 12:42:07,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:42:07,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:42:07,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:42:07,617 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:42:07,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:42:07,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:42:07,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:42:07,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:42:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:42:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:42:07,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:42:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:42:08,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:42:08,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844968605] [2022-12-14 12:42:08,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:42:08,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184278747] [2022-12-14 12:42:08,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184278747] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:42:08,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [399750704] [2022-12-14 12:42:08,039 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:42:08,039 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:42:08,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:42:08,039 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:42:08,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:42:08,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,118 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:42:08,118 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:42:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,135 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 39 [2022-12-14 12:42:08,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 12:42:08,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-12-14 12:42:08,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:08,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:08,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:08,298 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-12-14 12:42:08,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-12-14 12:42:08,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:42:08,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:08,451 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:42:08,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:42:08,522 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:42:08,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:42:08,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:08,585 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:42:08,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 12:42:08,637 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:42:08,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:42:08,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:42:08,671 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 12:42:08,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 12:42:08,719 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:42:08,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:42:08,739 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:42:09,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2867#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:42:09,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:42:09,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:42:09,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 12:42:09,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31756747] [2022-12-14 12:42:09,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:42:09,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:42:09,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:42:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:42:09,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:42:09,011 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:42:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:42:09,304 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-12-14 12:42:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:42:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 12:42:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:42:09,305 INFO L225 Difference]: With dead ends: 61 [2022-12-14 12:42:09,305 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 12:42:09,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-12-14 12:42:09,306 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:42:09,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:42:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 12:42:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2022-12-14 12:42:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 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) [2022-12-14 12:42:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-12-14 12:42:09,335 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 25 [2022-12-14 12:42:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:42:09,335 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-12-14 12:42:09,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:42:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-12-14 12:42:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:42:09,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:42:09,336 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:42:09,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:42:09,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:42:09,537 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:42:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:42:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1877163832, now seen corresponding path program 12 times [2022-12-14 12:42:09,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:42:09,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109181220] [2022-12-14 12:42:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:42:09,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:42:09,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:42:09,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261749589] [2022-12-14 12:42:09,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:42:09,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:42:09,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:42:09,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:42:09,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:42:09,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:42:09,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:42:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:42:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:42:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:42:09,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:42:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:42:09,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:42:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109181220] [2022-12-14 12:42:09,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:42:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261749589] [2022-12-14 12:42:09,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261749589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:42:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462927339] [2022-12-14 12:42:09,840 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:42:09,840 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:42:09,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:42:09,840 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:42:09,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:42:09,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:09,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:09,909 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-12-14 12:42:09,910 INFO L350 Elim1Store]: Elim1 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 8 case distinctions, treesize of input 40 treesize of output 69 [2022-12-14 12:42:09,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:09,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-12-14 12:42:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:09,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:09,940 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 39 [2022-12-14 12:42:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:09,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-12-14 12:42:10,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:10,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:10,075 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-12-14 12:42:10,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-12-14 12:42:10,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:42:10,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:10,162 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-12-14 12:42:10,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 12:42:10,215 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:42:10,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:42:10,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:10,268 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-12-14 12:42:10,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-12-14 12:42:10,334 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-12-14 12:42:10,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-12-14 12:42:10,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:42:10,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:10,387 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 12:42:10,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 12:42:10,450 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 12:42:10,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-12-14 12:42:10,471 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:42:11,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3234#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem16#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0)) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-12-14 12:42:11,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:42:11,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:42:11,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-12-14 12:42:11,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414990208] [2022-12-14 12:42:11,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:42:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:42:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:42:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:42:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:42:11,050 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:42:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:42:11,237 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-12-14 12:42:11,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 12:42:11,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 12:42:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:42:11,238 INFO L225 Difference]: With dead ends: 60 [2022-12-14 12:42:11,238 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 12:42:11,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-12-14 12:42:11,239 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:42:11,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:42:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 12:42:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 12:42:11,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:42:11,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-12-14 12:42:11,254 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-12-14 12:42:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:42:11,255 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-12-14 12:42:11,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:42:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-12-14 12:42:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 12:42:11,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:42:11,255 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:42:11,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 12:42:11,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:42:11,455 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:42:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:42:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 616366677, now seen corresponding path program 13 times [2022-12-14 12:42:11,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:42:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676789605] [2022-12-14 12:42:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:42:11,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:42:11,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:42:11,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013543245] [2022-12-14 12:42:11,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:42:11,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:42:11,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:42:11,471 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:42:11,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1db172d-b647-4fa8-b941-3e1d47237468/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:42:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:42:11,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 143 conjunts are in the unsatisfiable core [2022-12-14 12:42:11,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:42:11,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:42:11,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 12:42:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-12-14 12:42:11,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,671 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 48 treesize of output 53 [2022-12-14 12:42:11,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 68 [2022-12-14 12:42:11,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2022-12-14 12:42:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-12-14 12:42:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 71 [2022-12-14 12:42:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:11,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2022-12-14 12:42:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:12,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 79 [2022-12-14 12:42:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 78 [2022-12-14 12:42:12,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 76 [2022-12-14 12:42:12,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:12,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2022-12-14 12:42:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 71 [2022-12-14 12:42:12,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:12,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 76 [2022-12-14 12:42:12,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 73 [2022-12-14 12:42:12,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 71 [2022-12-14 12:42:12,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:12,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 71 [2022-12-14 12:42:13,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 71 [2022-12-14 12:42:13,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 71 [2022-12-14 12:42:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:13,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 74 [2022-12-14 12:42:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 65 [2022-12-14 12:42:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:13,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 48 [2022-12-14 12:42:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:42:13,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:44:41,448 WARN L837 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (or (= (let ((.cse6 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24)) (.cse8 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (let ((.cse24 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))) (let ((.cse22 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24))) (let ((.cse23 (select .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse16 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse21 (select .cse24 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse18 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse17 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse18 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse20 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse19 (select (select (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse20 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6))) (let ((.cse10 (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse16 .cse17 .cse18 .cse19 .cse20 .cse21))))) (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse12 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse11 (let ((.cse13 (let ((.cse14 (let ((.cse15 (store .cse12 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse16 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse17 .cse18 .cse19 .cse20 .cse21)))) (store .cse15 .cse9 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse15) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse12 .cse9)))))) (store .cse14 .cse8 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse12 .cse8)))))) (store .cse13 .cse7 (+ (select .cse12 .cse7) (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse11 .cse6 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| .cse11) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse12 .cse6))))))))))))))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (let ((.cse4 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse2 .cse3 .cse4 .cse5)))))))) (+ ~N~0 (* ~N~0 ~N~0))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| ~N~0)))) is different from false