./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/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_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/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_e628ff42-9084-4edf-9a6c-e53e5fea41f7/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 cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 --- 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 12:15:03,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:15:03,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:15:03,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:15:03,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:15:03,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:15:03,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:15:04,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:15:04,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:15:04,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:15:04,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:15:04,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:15:04,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:15:04,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:15:04,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:15:04,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:15:04,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:15:04,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:15:04,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:15:04,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:15:04,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:15:04,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:15:04,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:15:04,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:15:04,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:15:04,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:15:04,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:15:04,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:15:04,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:15:04,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:15:04,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:15:04,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:15:04,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:15:04,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:15:04,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:15:04,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:15:04,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:15:04,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:15:04,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:15:04,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:15:04,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:15:04,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:15:04,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:15:04,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:15:04,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:15:04,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:15:04,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:15:04,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:15:04,064 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:15:04,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:15:04,065 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:15:04,065 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:15:04,065 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:15:04,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:15:04,065 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:15:04,065 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:15:04,065 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:15:04,066 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:15:04,066 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:15:04,066 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:15:04,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:15:04,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:15:04,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:15:04,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:15:04,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:15:04,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:15:04,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:15:04,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:15:04,068 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:15:04,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:15:04,068 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:15:04,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:15:04,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:15:04,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:15:04,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:15:04,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:15:04,069 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:15:04,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:15:04,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:15:04,070 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:15:04,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:15:04,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:15:04,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:15:04,071 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_e628ff42-9084-4edf-9a6c-e53e5fea41f7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 [2022-12-14 12:15:04,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:15:04,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:15:04,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:15:04,250 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:15:04,250 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:15:04,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2022-12-14 12:15:06,867 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:15:06,988 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:15:06,988 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2022-12-14 12:15:06,992 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/data/0cc3bb155/aebc534aefa5494690d3cc2b784d78a8/FLAG7874924f6 [2022-12-14 12:15:07,004 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/data/0cc3bb155/aebc534aefa5494690d3cc2b784d78a8 [2022-12-14 12:15:07,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:15:07,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:15:07,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:15:07,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:15:07,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:15:07,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa6443c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07, skipping insertion in model container [2022-12-14 12:15:07,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:15:07,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:15:07,165 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_e628ff42-9084-4edf-9a6c-e53e5fea41f7/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2022-12-14 12:15:07,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:15:07,187 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:15:07,195 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_e628ff42-9084-4edf-9a6c-e53e5fea41f7/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2022-12-14 12:15:07,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:15:07,214 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:15:07,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07 WrapperNode [2022-12-14 12:15:07,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:15:07,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:15:07,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:15:07,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:15:07,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,240 INFO L138 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2022-12-14 12:15:07,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:15:07,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:15:07,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:15:07,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:15:07,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,257 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:15:07,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:15:07,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:15:07,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:15:07,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (1/1) ... [2022-12-14 12:15:07,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:15:07,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:07,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:15:07,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:15:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:15:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:15:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:15:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:15:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:15:07,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:15:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:15:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:15:07,373 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:15:07,374 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:15:07,505 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:15:07,546 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:15:07,546 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-14 12:15:07,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:15:07 BoogieIcfgContainer [2022-12-14 12:15:07,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:15:07,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:15:07,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:15:07,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:15:07,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:15:07" (1/3) ... [2022-12-14 12:15:07,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcde180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:15:07, skipping insertion in model container [2022-12-14 12:15:07,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:07" (2/3) ... [2022-12-14 12:15:07,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcde180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:15:07, skipping insertion in model container [2022-12-14 12:15:07,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:15:07" (3/3) ... [2022-12-14 12:15:07,557 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2022-12-14 12:15:07,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:15:07,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:15:07,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:15:07,618 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;@1a1e0319, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:15:07,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:15:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 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 12:15:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:15:07,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:07,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:07,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1309612569, now seen corresponding path program 1 times [2022-12-14 12:15:07,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:07,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767585300] [2022-12-14 12:15:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:07,718 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:15:07,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595502675] [2022-12-14 12:15:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:07,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:07,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:07,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:15:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:07,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:15:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:07,844 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 12:15:07,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:15:07,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:07,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767585300] [2022-12-14 12:15:07,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:15:07,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595502675] [2022-12-14 12:15:07,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595502675] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:15:07,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:15:07,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:15:07,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354743995] [2022-12-14 12:15:07,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:15:07,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:15:07,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:07,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:15:07,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:15:07,873 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 12:15:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:07,928 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2022-12-14 12:15:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:15:07,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 12:15:07,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:07,946 INFO L225 Difference]: With dead ends: 27 [2022-12-14 12:15:07,946 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 12:15:07,949 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 12:15:07,951 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:07,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 12:15:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-12-14 12:15:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-12-14 12:15:07,980 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2022-12-14 12:15:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:07,980 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-12-14 12:15:07,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 12:15:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-12-14 12:15:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 12:15:07,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:07,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:07,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:15:08,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 12:15:08,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:08,185 INFO L85 PathProgramCache]: Analyzing trace with hash -215038707, now seen corresponding path program 1 times [2022-12-14 12:15:08,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:08,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143358582] [2022-12-14 12:15:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:08,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:08,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:15:08,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895078148] [2022-12-14 12:15:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:08,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:08,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:08,222 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:08,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:15:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:08,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:15:08,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:08,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:15:08,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143358582] [2022-12-14 12:15:08,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:15:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895078148] [2022-12-14 12:15:08,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895078148] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:15:08,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:15:08,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:15:08,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339488977] [2022-12-14 12:15:08,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:15:08,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:15:08,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:08,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:15:08,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:15:08,362 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:08,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:08,413 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2022-12-14 12:15:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:15:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 12:15:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:08,414 INFO L225 Difference]: With dead ends: 37 [2022-12-14 12:15:08,414 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 12:15:08,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 12:15:08,416 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:08,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 12:15:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2022-12-14 12:15:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 12:15:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2022-12-14 12:15:08,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 10 [2022-12-14 12:15:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:08,420 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2022-12-14 12:15:08,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2022-12-14 12:15:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 12:15:08,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:08,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:08,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:15:08,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:08,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:08,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1517764035, now seen corresponding path program 1 times [2022-12-14 12:15:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:08,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218888994] [2022-12-14 12:15:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:08,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:08,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:15:08,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845233087] [2022-12-14 12:15:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:08,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:08,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:08,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:08,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:15:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:15:08,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:08,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:08,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:08,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218888994] [2022-12-14 12:15:08,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:15:08,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845233087] [2022-12-14 12:15:08,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845233087] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:08,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1988949498] [2022-12-14 12:15:08,785 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 12:15:08,786 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:08,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:08,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:08,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:08,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:08,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:08,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:08,956 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-12-14 12:15:08,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-12-14 12:15:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,102 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 12:15:09,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 12:15:09,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-12-14 12:15:09,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,554 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-12-14 12:15:09,554 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-12-14 12:15:09,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,671 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:09,671 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:09,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,711 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:09,711 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:09,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:10,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1988949498] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:15:10,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:15:10,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-12-14 12:15:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780849051] [2022-12-14 12:15:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:15:10,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:15:10,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:15:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:15:10,304 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:11,614 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-12-14 12:15:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:15:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 12:15:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:11,614 INFO L225 Difference]: With dead ends: 39 [2022-12-14 12:15:11,615 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 12:15:11,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:15:11,616 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:11,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:15:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 12:15:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-12-14 12:15:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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 12:15:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-12-14 12:15:11,625 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 11 [2022-12-14 12:15:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:11,625 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-12-14 12:15:11,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-12-14 12:15:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 12:15:11,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:11,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:11,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:15:11,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 12:15:11,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:11,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:11,827 INFO L85 PathProgramCache]: Analyzing trace with hash 862012475, now seen corresponding path program 1 times [2022-12-14 12:15:11,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:11,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293594242] [2022-12-14 12:15:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:11,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:11,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:15:11,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122061385] [2022-12-14 12:15:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:11,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:11,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:11,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:11,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:15:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:15:11,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:15:11,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:15:11,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293594242] [2022-12-14 12:15:11,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:15:11,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122061385] [2022-12-14 12:15:11,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122061385] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:11,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271493496] [2022-12-14 12:15:11,921 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:15:11,921 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:11,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:11,922 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:11,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:11,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,012 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 12:15:12,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 12:15:12,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-12-14 12:15:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-12-14 12:15:12,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,386 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-12-14 12:15:12,386 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-12-14 12:15:12,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,491 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:12,491 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:12,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,523 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:12,524 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:12,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,636 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:15:12,636 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:15:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,671 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:12,672 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:12,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,707 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:12,707 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:12,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,746 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:15:12,746 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:15:12,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,768 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:12,768 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:12,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,791 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:15:12,791 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:15:12,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,824 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:12,824 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:12,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,851 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:12,851 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:12,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,908 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:15:12,909 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:15:12,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,009 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:15:13,009 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:15:13,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,116 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:15:13,116 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:15:13,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,189 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:15:13,189 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:15:13,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,300 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:13,301 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:13,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,335 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:13,336 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:13,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,377 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:13,377 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:13,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:16,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '518#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 12:15:16,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:16,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:15:16,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-14 12:15:16,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341861742] [2022-12-14 12:15:16,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:16,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:15:16,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:15:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:15:16,172 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:16,268 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-12-14 12:15:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:15:16,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 12:15:16,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:16,269 INFO L225 Difference]: With dead ends: 63 [2022-12-14 12:15:16,269 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 12:15:16,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:15:16,269 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:16,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 16 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:15:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 12:15:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-12-14 12:15:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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 12:15:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-12-14 12:15:16,279 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 17 [2022-12-14 12:15:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:16,279 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-12-14 12:15:16,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-12-14 12:15:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 12:15:16,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:16,280 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:16,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:15:16,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:16,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash 883853987, now seen corresponding path program 2 times [2022-12-14 12:15:16,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:16,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094256885] [2022-12-14 12:15:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:16,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:15:16,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914463580] [2022-12-14 12:15:16,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:15:16,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:16,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:16,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:16,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:15:16,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:15:16,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:16,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:15:16,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:15:16,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:15:16,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094256885] [2022-12-14 12:15:16,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:15:16,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914463580] [2022-12-14 12:15:16,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914463580] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:16,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283127497] [2022-12-14 12:15:16,660 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:15:16,660 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:16,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:16,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:16,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:16,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,763 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 12:15:16,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 12:15:16,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-12-14 12:15:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-12-14 12:15:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:17,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,041 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-12-14 12:15:17,042 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-12-14 12:15:17,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,135 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,136 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,170 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,171 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,291 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:15:17,292 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:15:17,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,322 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,323 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,357 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,357 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,409 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,409 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,442 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,443 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,475 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,475 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,502 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,503 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,537 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,538 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,570 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,571 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:17,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,622 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-12-14 12:15:17,623 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 3 case distinctions, treesize of input 41 treesize of output 58 [2022-12-14 12:15:17,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,702 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:15:17,702 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:15:17,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,793 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:15:17,793 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:15:17,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,876 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:15:17,877 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:15:17,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,960 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:15:17,961 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:15:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,991 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:17,991 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:18,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:18,025 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:15:18,026 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:15:18,028 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:21,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '865#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 12:15:21,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:21,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:15:21,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-14 12:15:21,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836023225] [2022-12-14 12:15:21,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:21,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:15:21,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:21,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:15:21,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-14 12:15:21,290 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 12:15:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:21,414 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2022-12-14 12:15:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:15:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 26 [2022-12-14 12:15:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:21,417 INFO L225 Difference]: With dead ends: 171 [2022-12-14 12:15:21,417 INFO L226 Difference]: Without dead ends: 141 [2022-12-14 12:15:21,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:15:21,418 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:21,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 16 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:15:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-14 12:15:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2022-12-14 12:15:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 91 states have internal predecessors, (111), 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 12:15:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-12-14 12:15:21,450 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 26 [2022-12-14 12:15:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:21,450 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-12-14 12:15:21,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 12:15:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-12-14 12:15:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 12:15:21,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:21,452 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:21,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:15:21,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:21,652 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1008971561, now seen corresponding path program 3 times [2022-12-14 12:15:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:21,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211020374] [2022-12-14 12:15:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:21,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:21,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:15:21,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765198196] [2022-12-14 12:15:21,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:15:21,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:21,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:21,679 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:21,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:21:01,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:21:01,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:21:01,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:21:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-12-14 12:21:01,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-12-14 12:21:01,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:01,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211020374] [2022-12-14 12:21:01,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:01,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765198196] [2022-12-14 12:21:01,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765198196] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:01,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616708624] [2022-12-14 12:21:01,452 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:21:01,452 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:01,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:01,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:01,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:01,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,559 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 12:21:01,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 12:21:01,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-12-14 12:21:01,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-12-14 12:21:01,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:01,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:01,834 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-12-14 12:21:01,835 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-12-14 12:21:01,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:01,933 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:01,933 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:01,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:01,962 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:01,962 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,075 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:21:02,075 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:21:02,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,106 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,106 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,134 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,134 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,177 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:21:02,177 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:21:02,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,200 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,200 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,224 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,225 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,256 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,256 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,304 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,305 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,359 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-12-14 12:21:02,359 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 3 case distinctions, treesize of input 41 treesize of output 58 [2022-12-14 12:21:02,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,457 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:21:02,457 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:21:02,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,543 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:21:02,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:21:02,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,620 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:21:02,620 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:21:02,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,687 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,687 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,719 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,720 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:02,751 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:02,751 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:02,755 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:06,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1851#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 12:21:06,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:06,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:21:06,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-14 12:21:06,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155918687] [2022-12-14 12:21:06,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:06,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 12:21:06,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:06,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 12:21:06,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:21:06,405 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 12:21:06,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:06,646 INFO L93 Difference]: Finished difference Result 286 states and 398 transitions. [2022-12-14 12:21:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 12:21:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 80 [2022-12-14 12:21:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:06,648 INFO L225 Difference]: With dead ends: 286 [2022-12-14 12:21:06,648 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 12:21:06,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 26 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:21:06,649 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 180 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:06,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 34 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:21:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 12:21:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 182. [2022-12-14 12:21:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.143646408839779) internal successors, (207), 181 states have internal predecessors, (207), 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 12:21:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2022-12-14 12:21:06,708 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 80 [2022-12-14 12:21:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:06,708 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2022-12-14 12:21:06,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 12:21:06,708 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2022-12-14 12:21:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 12:21:06,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:06,713 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:06,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:21:06,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:06,914 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1816079575, now seen corresponding path program 4 times [2022-12-14 12:21:06,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:06,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221297883] [2022-12-14 12:21:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:06,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:07,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:07,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792105356] [2022-12-14 12:21:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:21:07,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:07,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:07,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:07,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:21:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:21:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 12:21:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:21:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2868 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2022-12-14 12:21:07,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2868 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2022-12-14 12:21:07,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:21:07,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221297883] [2022-12-14 12:21:07,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 12:21:07,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792105356] [2022-12-14 12:21:07,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792105356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:07,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675902178] [2022-12-14 12:21:07,565 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 12:21:07,565 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:07,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:07,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:07,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:07,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,661 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 12:21:07,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 12:21:07,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-12-14 12:21:07,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-12-14 12:21:07,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:07,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:07,915 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-12-14 12:21:07,915 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-12-14 12:21:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,009 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,010 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,038 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,039 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,140 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:21:08,140 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:21:08,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,166 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,166 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,192 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,192 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,230 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:21:08,231 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:21:08,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,255 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,255 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,280 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:21:08,281 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:21:08,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,308 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,308 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,335 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,336 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,384 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:21:08,385 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:21:08,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,465 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:21:08,466 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:21:08,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,540 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:21:08,541 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:21:08,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,613 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-12-14 12:21:08,614 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-12-14 12:21:08,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,683 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:21:08,683 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-12-14 12:21:08,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,709 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,710 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:08,737 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:21:08,738 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-12-14 12:21:08,741 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:13,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3685#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-12-14 12:21:13,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:13,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:21:13,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-12-14 12:21:13,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045827434] [2022-12-14 12:21:13,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:13,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 12:21:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 12:21:13,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-12-14 12:21:13,308 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:21:13,813 INFO L93 Difference]: Finished difference Result 574 states and 770 transitions. [2022-12-14 12:21:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 12:21:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-12-14 12:21:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:21:13,815 INFO L225 Difference]: With dead ends: 574 [2022-12-14 12:21:13,815 INFO L226 Difference]: Without dead ends: 405 [2022-12-14 12:21:13,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 374 SyntacticMatches, 50 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=723, Invalid=1083, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 12:21:13,816 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 400 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:21:13,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 70 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:21:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-12-14 12:21:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 362. [2022-12-14 12:21:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.105263157894737) internal successors, (399), 361 states have internal predecessors, (399), 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 12:21:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 399 transitions. [2022-12-14 12:21:13,928 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 399 transitions. Word has length 152 [2022-12-14 12:21:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:21:13,928 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 399 transitions. [2022-12-14 12:21:13,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:21:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 399 transitions. [2022-12-14 12:21:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-12-14 12:21:13,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:21:13,933 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:21:13,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:21:14,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:14,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:21:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:21:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1993710377, now seen corresponding path program 5 times [2022-12-14 12:21:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:21:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842271531] [2022-12-14 12:21:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:21:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:21:14,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 12:21:14,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112880670] [2022-12-14 12:21:14,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:21:14,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:21:14,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:21:14,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:21:14,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e628ff42-9084-4edf-9a6c-e53e5fea41f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process