./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7 --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 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:32:06,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:32:06,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:32:06,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:32:06,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:32:06,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:32:06,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:32:06,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:32:06,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:32:06,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:32:06,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:32:06,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:32:06,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:32:06,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:32:06,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:32:06,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:32:06,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:32:06,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:32:06,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:32:06,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:32:06,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:32:06,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:32:06,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:32:06,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:32:06,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:32:06,955 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:32:06,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:32:06,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:32:06,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:32:06,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:32:06,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:32:06,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:32:06,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:32:06,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:32:06,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:32:06,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:32:06,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:32:06,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:32:06,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:32:06,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:32:06,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:32:06,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:32:06,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:32:06,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:32:06,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:32:06,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:32:06,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:32:06,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:32:06,992 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:32:06,992 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:32:06,992 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:32:06,993 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:32:06,993 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:32:06,993 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:32:06,993 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:32:06,993 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:32:06,993 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:32:06,994 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:32:06,994 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:32:06,994 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:32:06,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:32:06,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:32:06,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:32:06,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:32:06,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:32:06,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:32:06,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:32:06,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:32:06,996 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:32:06,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:32:06,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:32:06,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:32:06,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:32:06,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:32:06,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:06,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:32:06,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:32:06,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:32:06,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:32:06,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:32:06,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:32:06,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:32:06,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:32:06,999 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2021-11-25 19:32:07,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:32:07,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:32:07,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:32:07,310 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:32:07,311 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:32:07,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2021-11-25 19:32:07,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/data/e0993f1e0/3074d7988fdc4eccbbffd2e6c1206674/FLAGf830de2cd [2021-11-25 19:32:07,845 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:32:07,845 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2021-11-25 19:32:07,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/data/e0993f1e0/3074d7988fdc4eccbbffd2e6c1206674/FLAGf830de2cd [2021-11-25 19:32:08,213 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/data/e0993f1e0/3074d7988fdc4eccbbffd2e6c1206674 [2021-11-25 19:32:08,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:32:08,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:32:08,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:08,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:32:08,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:32:08,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42010d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08, skipping insertion in model container [2021-11-25 19:32:08,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:32:08,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:32:08,496 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2021-11-25 19:32:08,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:08,530 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:32:08,540 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2021-11-25 19:32:08,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:32:08,563 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:32:08,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08 WrapperNode [2021-11-25 19:32:08,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:32:08,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:08,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:32:08,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:32:08,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,611 INFO L137 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2021-11-25 19:32:08,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:32:08,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:32:08,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:32:08,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:32:08,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:32:08,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:32:08,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:32:08,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:32:08,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (1/1) ... [2021-11-25 19:32:08,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:32:08,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:08,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:32:08,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:32:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:32:08,716 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:32:08,717 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:32:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:32:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:32:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:32:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:32:08,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:32:08,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:32:08,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:32:08,778 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:32:08,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:32:08,923 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:32:08,985 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:32:08,987 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-25 19:32:08,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:08 BoogieIcfgContainer [2021-11-25 19:32:08,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:32:08,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:32:08,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:32:09,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:32:09,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:32:08" (1/3) ... [2021-11-25 19:32:09,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6172f936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:09, skipping insertion in model container [2021-11-25 19:32:09,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:32:08" (2/3) ... [2021-11-25 19:32:09,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6172f936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:32:09, skipping insertion in model container [2021-11-25 19:32:09,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:32:08" (3/3) ... [2021-11-25 19:32:09,004 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2021-11-25 19:32:09,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:32:09,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:32:09,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:32:09,082 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:32:09,082 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:32:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:32:09,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:09,118 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:09,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 958502, now seen corresponding path program 1 times [2021-11-25 19:32:09,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:09,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122211288] [2021-11-25 19:32:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:09,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:09,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:09,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173862698] [2021-11-25 19:32:09,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:09,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:09,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:09,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:09,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:32:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:09,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:32:09,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:32:09,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:32:09,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:09,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122211288] [2021-11-25 19:32:09,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:09,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173862698] [2021-11-25 19:32:09,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173862698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:09,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:09,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:32:09,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408605632] [2021-11-25 19:32:09,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:09,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:32:09,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:32:09,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:32:09,592 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:32:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:09,718 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2021-11-25 19:32:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:32:09,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-25 19:32:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:09,730 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:32:09,730 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 19:32:09,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:32:09,739 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:09,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 15 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 19:32:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2021-11-25 19:32:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-25 19:32:09,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 14 [2021-11-25 19:32:09,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:09,792 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-25 19:32:09,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:32:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-25 19:32:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:32:09,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:09,795 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:09,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:09,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:09,999 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash 885154967, now seen corresponding path program 1 times [2021-11-25 19:32:10,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:10,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22761855] [2021-11-25 19:32:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:10,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:10,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:10,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96703133] [2021-11-25 19:32:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:10,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:10,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:10,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:10,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:32:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:32:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:32:10,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:32:10,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:10,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22761855] [2021-11-25 19:32:10,153 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:10,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96703133] [2021-11-25 19:32:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96703133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:10,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:32:10,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:32:10,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719783781] [2021-11-25 19:32:10,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:10,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:32:10,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:10,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:32:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:32:10,156 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:32:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:10,204 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2021-11-25 19:32:10,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:32:10,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-25 19:32:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:10,205 INFO L225 Difference]: With dead ends: 36 [2021-11-25 19:32:10,206 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 19:32:10,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:32:10,208 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:10,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:32:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 19:32:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2021-11-25 19:32:10,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-25 19:32:10,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 16 [2021-11-25 19:32:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:10,216 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-25 19:32:10,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:32:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-25 19:32:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:32:10,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:10,217 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:10,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:10,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 19:32:10,444 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -690883628, now seen corresponding path program 1 times [2021-11-25 19:32:10,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454914485] [2021-11-25 19:32:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:10,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:10,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285255142] [2021-11-25 19:32:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:10,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:10,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:10,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:10,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:32:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:10,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:32:10,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:32:10,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:32:10,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:10,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454914485] [2021-11-25 19:32:10,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285255142] [2021-11-25 19:32:10,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285255142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952026504] [2021-11-25 19:32:10,742 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:32:10,742 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:10,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:10,753 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:10,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:10,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:10,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:10,908 INFO L354 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2021-11-25 19:32:10,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2021-11-25 19:32:10,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:10,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:11,051 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:11,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:11,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:11,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:32:12,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:12,066 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:32:12,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:32:12,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:12,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:12,504 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 19:32:12,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 213 [2021-11-25 19:32:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:12,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:12,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:12,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:12,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:12,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:12,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:12,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:13,069 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:13,174 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:13,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1952026504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:32:13,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:13,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 14 [2021-11-25 19:32:13,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925208828] [2021-11-25 19:32:13,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:32:13,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:32:13,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:32:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:32:13,938 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:32:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:14,683 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-11-25 19:32:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:32:14,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-25 19:32:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:14,684 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:32:14,684 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:32:14,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:32:14,686 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:14,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 17 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2021-11-25 19:32:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:32:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-25 19:32:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-25 19:32:14,700 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 17 [2021-11-25 19:32:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:14,701 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-25 19:32:14,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:32:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-25 19:32:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:32:14,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:14,702 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:14,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:14,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:14,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash -853688222, now seen corresponding path program 1 times [2021-11-25 19:32:14,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:14,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222477862] [2021-11-25 19:32:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:14,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:14,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:14,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235178441] [2021-11-25 19:32:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:14,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:14,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:14,945 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:14,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:32:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:32:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:32:15,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:32:15,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:15,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222477862] [2021-11-25 19:32:15,117 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:15,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235178441] [2021-11-25 19:32:15,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235178441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:15,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016939259] [2021-11-25 19:32:15,127 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:15,127 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:15,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:15,128 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:15,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:15,253 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:15,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:15,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:15,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:15,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:32:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:15,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:32:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:15,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:15,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:15,817 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:32:15,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:32:15,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:16,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:16,104 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 19:32:16,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 213 [2021-11-25 19:32:16,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:16,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:16,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:16,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:16,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:16,441 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:16,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:16,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:16,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:16,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:16,581 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-25 19:32:16,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2021-11-25 19:32:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:16,678 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:16,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:16,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:16,760 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:16,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:16,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:32:16,987 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:32:16,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:32:17,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:17,166 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:17,260 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:18,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '623#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:18,392 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:18,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:18,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-25 19:32:18,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396363236] [2021-11-25 19:32:18,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:18,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:32:18,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:32:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:32:18,398 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:18,575 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2021-11-25 19:32:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:32:18,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2021-11-25 19:32:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:18,583 INFO L225 Difference]: With dead ends: 72 [2021-11-25 19:32:18,583 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 19:32:18,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:32:18,585 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:18,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 29 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 19:32:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 25. [2021-11-25 19:32:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-25 19:32:18,616 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 20 [2021-11-25 19:32:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:18,617 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-25 19:32:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-25 19:32:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:32:18,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:18,619 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:18,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:18,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:18,839 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:18,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1062684031, now seen corresponding path program 2 times [2021-11-25 19:32:18,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:18,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783149372] [2021-11-25 19:32:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:18,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:18,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:18,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929460241] [2021-11-25 19:32:18,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:32:18,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:18,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:18,857 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:18,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:32:18,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:32:18,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:32:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:32:19,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:32:19,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:19,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783149372] [2021-11-25 19:32:19,097 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929460241] [2021-11-25 19:32:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929460241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397570214] [2021-11-25 19:32:19,100 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:19,101 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:19,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:19,101 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:19,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:19,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,204 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:19,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:19,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:32:19,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:32:19,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,667 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:32:19,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:32:19,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:19,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:19,935 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 19:32:19,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 209 [2021-11-25 19:32:20,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:20,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:20,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:20,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:20,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:20,228 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:20,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:20,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:20,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:20,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:20,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:20,353 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-25 19:32:20,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2021-11-25 19:32:20,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:20,430 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:20,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:20,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:20,479 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:20,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:20,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:32:20,710 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:32:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:32:20,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:20,858 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:20,930 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:22,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '943#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:22,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:22,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:22,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-25 19:32:22,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586050835] [2021-11-25 19:32:22,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:22,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:32:22,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:32:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:32:22,055 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:22,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:22,213 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2021-11-25 19:32:22,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:32:22,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2021-11-25 19:32:22,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:22,216 INFO L225 Difference]: With dead ends: 80 [2021-11-25 19:32:22,216 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 19:32:22,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:32:22,218 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:22,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 27 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 19:32:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2021-11-25 19:32:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-11-25 19:32:22,234 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 23 [2021-11-25 19:32:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:22,235 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-11-25 19:32:22,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-11-25 19:32:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:32:22,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:22,237 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:22,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:22,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:22,440 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:22,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1211192102, now seen corresponding path program 3 times [2021-11-25 19:32:22,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:22,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858380785] [2021-11-25 19:32:22,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:22,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:22,449 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:22,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048863736] [2021-11-25 19:32:22,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:32:22,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:22,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:22,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:22,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:32:22,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:32:22,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:22,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:32:22,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 19:32:22,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 19:32:22,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:22,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858380785] [2021-11-25 19:32:22,642 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:22,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048863736] [2021-11-25 19:32:22,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048863736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771686061] [2021-11-25 19:32:22,651 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:22,652 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:22,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:22,652 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:22,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:22,735 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:22,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:22,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:22,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:22,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:32:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:23,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:32:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:23,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:23,197 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:32:23,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:32:23,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:23,439 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 19:32:23,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 213 [2021-11-25 19:32:23,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:23,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:23,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:23,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:23,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:23,781 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 19:32:23,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:32:23,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:23,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:23,944 INFO L354 Elim1Store]: treesize reduction 188, result has 23.6 percent of original size [2021-11-25 19:32:23,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2021-11-25 19:32:24,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:24,068 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:24,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:24,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:24,134 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:24,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:24,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:24,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:24,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:24,525 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:24,589 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:25,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1328#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:25,722 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:25,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:25,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-25 19:32:25,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680178105] [2021-11-25 19:32:25,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:25,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:32:25,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:25,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:32:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:32:25,724 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:32:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:25,837 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-11-25 19:32:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:32:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-25 19:32:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:25,839 INFO L225 Difference]: With dead ends: 52 [2021-11-25 19:32:25,839 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 19:32:25,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:32:25,841 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:25,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 22 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 19:32:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-11-25 19:32:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-11-25 19:32:25,858 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 29 [2021-11-25 19:32:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:25,859 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-11-25 19:32:25,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:32:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-11-25 19:32:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 19:32:25,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:25,860 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:25,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:26,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:32:26,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash -203748905, now seen corresponding path program 4 times [2021-11-25 19:32:26,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:26,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711315161] [2021-11-25 19:32:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:26,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:26,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:26,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232712509] [2021-11-25 19:32:26,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:32:26,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:26,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:26,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:32:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:26,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:32:26,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 19:32:26,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 19:32:26,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711315161] [2021-11-25 19:32:26,405 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:26,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232712509] [2021-11-25 19:32:26,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232712509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:26,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049777894] [2021-11-25 19:32:26,408 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:26,408 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:26,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:26,409 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:26,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:26,480 INFO L354 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2021-11-25 19:32:26,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2021-11-25 19:32:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:26,560 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:26,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:26,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 19:32:26,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:26,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:26,981 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-25 19:32:26,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 383 treesize of output 376 [2021-11-25 19:32:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:27,333 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 19:32:27,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 209 [2021-11-25 19:32:27,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:27,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:27,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:27,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:27,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:27,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:27,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:27,616 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:27,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:27,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:27,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:27,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:27,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:27,708 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-25 19:32:27,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2021-11-25 19:32:27,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:27,762 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:27,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:27,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:27,801 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:27,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:27,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:27,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:27,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:27,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:28,053 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:28,117 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:29,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1697#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:29,081 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:29,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:29,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-25 19:32:29,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816469448] [2021-11-25 19:32:29,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:29,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:32:29,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:29,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:32:29,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:32:29,082 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:29,443 INFO L93 Difference]: Finished difference Result 196 states and 273 transitions. [2021-11-25 19:32:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:32:29,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-25 19:32:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:29,446 INFO L225 Difference]: With dead ends: 196 [2021-11-25 19:32:29,446 INFO L226 Difference]: Without dead ends: 170 [2021-11-25 19:32:29,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:32:29,448 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 203 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:29,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 51 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:32:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-25 19:32:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 39. [2021-11-25 19:32:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-11-25 19:32:29,472 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 32 [2021-11-25 19:32:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:29,472 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-11-25 19:32:29,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2021-11-25 19:32:29,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:32:29,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:29,474 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:29,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:29,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:32:29,690 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash -96548681, now seen corresponding path program 5 times [2021-11-25 19:32:29,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:29,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895647337] [2021-11-25 19:32:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:29,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:29,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:29,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973981186] [2021-11-25 19:32:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:32:29,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:29,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:29,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:32:29,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:32:29,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:29,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:32:29,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-25 19:32:29,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-25 19:32:29,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895647337] [2021-11-25 19:32:29,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:29,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973981186] [2021-11-25 19:32:29,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973981186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:29,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583441342] [2021-11-25 19:32:29,994 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:29,994 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:29,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:29,995 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:29,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:30,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:30,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:30,066 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:30,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:30,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:32:30,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:30,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 19:32:30,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:30,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:30,473 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-25 19:32:30,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 383 treesize of output 376 [2021-11-25 19:32:30,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:30,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:32:30,758 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:32:30,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:32:30,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:30,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:30,896 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 19:32:30,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:32:30,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:30,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:31,040 INFO L354 Elim1Store]: treesize reduction 188, result has 23.6 percent of original size [2021-11-25 19:32:31,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2021-11-25 19:32:31,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:31,176 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:31,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:31,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:31,257 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:31,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:31,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:31,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:31,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:31,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:31,566 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:31,638 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:32,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2371#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:32,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:32,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:32,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-25 19:32:32,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962083449] [2021-11-25 19:32:32,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:32,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:32:32,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:32:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:32:32,622 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:32,773 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2021-11-25 19:32:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:32:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-11-25 19:32:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:32,775 INFO L225 Difference]: With dead ends: 125 [2021-11-25 19:32:32,775 INFO L226 Difference]: Without dead ends: 105 [2021-11-25 19:32:32,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 16 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:32:32,776 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 112 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:32,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 33 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-25 19:32:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2021-11-25 19:32:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-11-25 19:32:32,817 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 38 [2021-11-25 19:32:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:32,817 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-11-25 19:32:32,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-11-25 19:32:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:32:32,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:32,819 INFO L514 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:32,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:33,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:32:33,043 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:33,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:33,044 INFO L85 PathProgramCache]: Analyzing trace with hash -281535766, now seen corresponding path program 6 times [2021-11-25 19:32:33,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:33,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469069989] [2021-11-25 19:32:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:33,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:33,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:33,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111857537] [2021-11-25 19:32:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:32:33,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:33,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:33,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:32:33,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:32:33,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:32:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-25 19:32:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-25 19:32:34,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:34,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469069989] [2021-11-25 19:32:34,035 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:34,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111857537] [2021-11-25 19:32:34,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111857537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:34,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336148816] [2021-11-25 19:32:34,038 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:34,038 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:34,039 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:34,039 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:34,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:34,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:34,119 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:34,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:34,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:34,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:32:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:34,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 19:32:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:34,585 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-25 19:32:34,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 383 treesize of output 376 [2021-11-25 19:32:34,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:34,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:34,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:34,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:34,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:34,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:34,977 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 19:32:34,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:32:35,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:35,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:35,132 INFO L354 Elim1Store]: treesize reduction 188, result has 23.6 percent of original size [2021-11-25 19:32:35,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2021-11-25 19:32:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:35,272 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:35,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:35,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:35,350 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:35,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:35,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:35,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:35,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:35,675 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:35,735 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:37,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3217#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:37,112 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:37,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:37,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-25 19:32:37,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137747168] [2021-11-25 19:32:37,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:37,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 19:32:37,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 19:32:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:32:37,115 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:32:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:37,504 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2021-11-25 19:32:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:32:37,505 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 74 [2021-11-25 19:32:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:37,507 INFO L225 Difference]: With dead ends: 159 [2021-11-25 19:32:37,507 INFO L226 Difference]: Without dead ends: 139 [2021-11-25 19:32:37,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 175 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:32:37,509 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 167 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:37,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 72 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:32:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-25 19:32:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2021-11-25 19:32:37,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 83 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-11-25 19:32:37,555 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 74 [2021-11-25 19:32:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:37,556 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-11-25 19:32:37,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 21 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:32:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-11-25 19:32:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 19:32:37,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:37,558 INFO L514 BasicCegarLoop]: trace histogram [50, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:37,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:37,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:37,771 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1263812091, now seen corresponding path program 7 times [2021-11-25 19:32:37,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:37,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948991153] [2021-11-25 19:32:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:37,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:37,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:37,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634185163] [2021-11-25 19:32:37,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:32:37,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:37,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:37,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:37,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:32:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:37,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:32:37,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 489 proven. 55 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2021-11-25 19:32:38,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 489 proven. 55 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2021-11-25 19:32:38,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:38,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948991153] [2021-11-25 19:32:38,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:38,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634185163] [2021-11-25 19:32:38,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634185163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:38,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809971834] [2021-11-25 19:32:38,519 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:38,519 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:38,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:38,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:38,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,595 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:38,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:32:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 19:32:38,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:38,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:39,005 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-25 19:32:39,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 383 treesize of output 376 [2021-11-25 19:32:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:32:39,278 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:32:39,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:32:39,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:39,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:39,432 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 19:32:39,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:32:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:39,599 INFO L354 Elim1Store]: treesize reduction 188, result has 23.6 percent of original size [2021-11-25 19:32:39,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2021-11-25 19:32:39,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:39,680 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:39,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:39,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:39,726 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:39,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:39,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:39,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:39,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:39,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:40,043 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:40,093 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:41,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4237#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:41,285 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:41,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:41,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-25 19:32:41,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475091174] [2021-11-25 19:32:41,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:41,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:32:41,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:41,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:32:41,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 19:32:41,287 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:42,263 INFO L93 Difference]: Finished difference Result 515 states and 725 transitions. [2021-11-25 19:32:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:32:42,264 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 86 [2021-11-25 19:32:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:42,268 INFO L225 Difference]: With dead ends: 515 [2021-11-25 19:32:42,268 INFO L226 Difference]: Without dead ends: 446 [2021-11-25 19:32:42,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 212 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=735, Invalid=1335, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:32:42,271 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 370 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:42,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 91 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:32:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-25 19:32:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 147. [2021-11-25 19:32:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 143 states have (on average 1.0909090909090908) internal successors, (156), 143 states have internal predecessors, (156), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2021-11-25 19:32:42,374 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 86 [2021-11-25 19:32:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:42,374 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2021-11-25 19:32:42,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2021-11-25 19:32:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 19:32:42,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:42,390 INFO L514 BasicCegarLoop]: trace histogram [110, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:42,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:42,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:32:42,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:42,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2097720251, now seen corresponding path program 8 times [2021-11-25 19:32:42,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:42,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036486518] [2021-11-25 19:32:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:42,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:42,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:42,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873581355] [2021-11-25 19:32:42,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:32:42,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:42,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:42,633 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:42,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:32:42,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:32:42,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:42,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:32:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2021-11-25 19:32:43,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6610 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6593 trivial. 0 not checked. [2021-11-25 19:32:43,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036486518] [2021-11-25 19:32:43,401 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873581355] [2021-11-25 19:32:43,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873581355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:43,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892489470] [2021-11-25 19:32:43,403 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:43,403 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:43,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:43,403 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:43,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:43,456 INFO L354 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2021-11-25 19:32:43,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2021-11-25 19:32:43,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:43,530 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:43,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:43,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:43,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:32:43,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:43,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:43,922 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:32:43,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:32:43,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:44,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:44,120 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 19:32:44,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 209 [2021-11-25 19:32:44,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:44,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:44,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:32:44,305 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:32:44,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:32:44,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:44,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:44,405 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:44,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:44,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:44,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:44,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:44,504 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-25 19:32:44,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2021-11-25 19:32:44,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:44,567 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:44,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:44,613 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:44,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:44,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:32:44,828 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:32:44,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:32:44,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:44,951 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:45,005 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:45,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6389#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:45,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:45,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:45,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-25 19:32:45,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394593531] [2021-11-25 19:32:45,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:45,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:32:45,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:45,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:32:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:32:45,858 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:46,038 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2021-11-25 19:32:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:32:46,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 146 [2021-11-25 19:32:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:46,040 INFO L225 Difference]: With dead ends: 192 [2021-11-25 19:32:46,041 INFO L226 Difference]: Without dead ends: 175 [2021-11-25 19:32:46,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 418 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:32:46,042 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:46,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 24 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-25 19:32:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 168. [2021-11-25 19:32:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0975609756097562) internal successors, (180), 164 states have internal predecessors, (180), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 184 transitions. [2021-11-25 19:32:46,137 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 184 transitions. Word has length 146 [2021-11-25 19:32:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:46,138 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 184 transitions. [2021-11-25 19:32:46,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 184 transitions. [2021-11-25 19:32:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-25 19:32:46,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:46,141 INFO L514 BasicCegarLoop]: trace histogram [110, 16, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:46,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:46,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:46,367 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash -886786193, now seen corresponding path program 9 times [2021-11-25 19:32:46,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:46,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974396380] [2021-11-25 19:32:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:46,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:46,411 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:46,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217633398] [2021-11-25 19:32:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:32:46,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:46,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:46,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:32:49,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:32:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:32:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:32:49,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2021-11-25 19:32:49,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6772 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2021-11-25 19:32:50,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:50,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974396380] [2021-11-25 19:32:50,098 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:50,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217633398] [2021-11-25 19:32:50,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217633398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:50,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [532443408] [2021-11-25 19:32:50,100 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:50,101 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:50,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:50,101 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:50,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:50,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,168 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:50,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:50,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:32:50,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:32:50,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,489 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:32:50,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:32:50,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:50,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,655 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 19:32:50,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 213 [2021-11-25 19:32:50,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:50,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:50,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:50,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:50,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:50,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:50,930 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:50,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:51,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:51,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:51,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:51,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:51,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:51,026 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-25 19:32:51,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2021-11-25 19:32:51,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:51,077 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:51,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:51,114 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:51,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:51,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:51,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:51,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:51,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:51,399 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:51,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:52,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8051#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:52,703 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:52,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:52,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-25 19:32:52,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260984118] [2021-11-25 19:32:52,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:52,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:32:52,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:32:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:32:52,705 INFO L87 Difference]: Start difference. First operand 168 states and 184 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:32:52,979 INFO L93 Difference]: Finished difference Result 264 states and 315 transitions. [2021-11-25 19:32:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:32:52,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 158 [2021-11-25 19:32:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:32:52,981 INFO L225 Difference]: With dead ends: 264 [2021-11-25 19:32:52,981 INFO L226 Difference]: Without dead ends: 229 [2021-11-25 19:32:52,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 428 SyntacticMatches, 23 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:32:52,983 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:32:52,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:32:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-25 19:32:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 210. [2021-11-25 19:32:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.1067961165048543) internal successors, (228), 206 states have internal predecessors, (228), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:32:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 232 transitions. [2021-11-25 19:32:53,064 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 232 transitions. Word has length 158 [2021-11-25 19:32:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:32:53,064 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 232 transitions. [2021-11-25 19:32:53,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:32:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 232 transitions. [2021-11-25 19:32:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-25 19:32:53,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:32:53,067 INFO L514 BasicCegarLoop]: trace histogram [110, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:32:53,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:32:53,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:32:53,271 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:32:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:32:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1601306991, now seen corresponding path program 10 times [2021-11-25 19:32:53,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:32:53,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424477703] [2021-11-25 19:32:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:32:53,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:32:53,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:32:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279222290] [2021-11-25 19:32:53,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:32:53,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:32:53,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:32:53,317 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:32:53,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:32:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:32:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:32:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:32:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2021-11-25 19:32:54,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:32:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 2121 proven. 253 refuted. 0 times theorem prover too weak. 5154 trivial. 0 not checked. [2021-11-25 19:32:55,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:32:55,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424477703] [2021-11-25 19:32:55,264 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:32:55,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279222290] [2021-11-25 19:32:55,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279222290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:32:55,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821296373] [2021-11-25 19:32:55,266 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:32:55,266 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:32:55,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:32:55,267 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:32:55,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:32:55,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:55,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:55,353 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:32:55,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:32:55,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:55,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:32:55,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:55,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 19:32:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:55,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:55,672 INFO L354 Elim1Store]: treesize reduction 100, result has 21.3 percent of original size [2021-11-25 19:32:55,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 383 treesize of output 376 [2021-11-25 19:32:55,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:55,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:55,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:32:55,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:32:55,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:55,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:55,989 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 19:32:55,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:32:56,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:56,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:56,145 INFO L354 Elim1Store]: treesize reduction 178, result has 27.6 percent of original size [2021-11-25 19:32:56,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 157 [2021-11-25 19:32:56,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:56,221 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:56,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:32:56,269 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:32:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:32:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:32:56,507 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:32:56,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:32:56,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:32:56,621 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:32:56,681 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:32:59,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10100#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:32:59,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:32:59,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:32:59,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-25 19:32:59,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694327863] [2021-11-25 19:32:59,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:32:59,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-25 19:32:59,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:32:59,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-25 19:32:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2058, Unknown=0, NotChecked=0, Total=3422 [2021-11-25 19:32:59,140 INFO L87 Difference]: Start difference. First operand 210 states and 232 transitions. Second operand has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:33:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:01,892 INFO L93 Difference]: Finished difference Result 1037 states and 1406 transitions. [2021-11-25 19:33:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 19:33:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 182 [2021-11-25 19:33:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:01,899 INFO L225 Difference]: With dead ends: 1037 [2021-11-25 19:33:01,900 INFO L226 Difference]: Without dead ends: 857 [2021-11-25 19:33:01,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 440 SyntacticMatches, 47 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5480 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2583, Invalid=4059, Unknown=0, NotChecked=0, Total=6642 [2021-11-25 19:33:01,904 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 924 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 1089 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1089 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:01,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 159 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1089 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 19:33:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-11-25 19:33:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 330. [2021-11-25 19:33:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 326 states have (on average 1.0674846625766872) internal successors, (348), 326 states have internal predecessors, (348), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:33:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 352 transitions. [2021-11-25 19:33:02,051 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 352 transitions. Word has length 182 [2021-11-25 19:33:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:02,052 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 352 transitions. [2021-11-25 19:33:02,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:33:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 352 transitions. [2021-11-25 19:33:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-25 19:33:02,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:02,057 INFO L514 BasicCegarLoop]: trace histogram [230, 40, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:33:02,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:33:02,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:33:02,271 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:02,272 INFO L85 PathProgramCache]: Analyzing trace with hash -135742225, now seen corresponding path program 11 times [2021-11-25 19:33:02,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:02,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19363964] [2021-11-25 19:33:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:02,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:02,332 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:33:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928826028] [2021-11-25 19:33:02,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:33:02,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:33:02,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:33:02,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:33:17,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-25 19:33:17,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:33:17,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:33:17,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:33:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28468 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 28046 trivial. 0 not checked. [2021-11-25 19:33:18,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:33:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 28468 backedges. 4 proven. 418 refuted. 0 times theorem prover too weak. 28046 trivial. 0 not checked. [2021-11-25 19:33:18,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:33:18,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19363964] [2021-11-25 19:33:18,754 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:33:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928826028] [2021-11-25 19:33:18,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928826028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:33:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934760987] [2021-11-25 19:33:18,757 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:33:18,757 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:33:18,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:33:18,758 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:33:18,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:33:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:18,839 INFO L354 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2021-11-25 19:33:18,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2021-11-25 19:33:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:18,920 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:33:18,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:33:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:19,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:33:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:19,229 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:33:19,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:33:19,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:33:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:19,427 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 19:33:19,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 209 [2021-11-25 19:33:19,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:33:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:33:19,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:33:19,563 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:33:19,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:33:19,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:33:19,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:19,689 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 19:33:19,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:33:19,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:19,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:19,806 INFO L354 Elim1Store]: treesize reduction 188, result has 23.6 percent of original size [2021-11-25 19:33:19,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2021-11-25 19:33:19,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:19,878 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:33:19,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:33:19,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:33:19,913 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:33:19,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:33:20,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:33:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:33:20,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:33:20,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:33:20,170 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:33:20,225 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:33:21,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14550#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:33:21,159 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:33:21,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:33:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-25 19:33:21,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319689275] [2021-11-25 19:33:21,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:33:21,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:33:21,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:33:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:33:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 19:33:21,161 INFO L87 Difference]: Start difference. First operand 330 states and 352 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:33:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:33:21,947 INFO L93 Difference]: Finished difference Result 528 states and 615 transitions. [2021-11-25 19:33:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:33:21,948 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 302 [2021-11-25 19:33:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:33:21,952 INFO L225 Difference]: With dead ends: 528 [2021-11-25 19:33:21,952 INFO L226 Difference]: Without dead ends: 457 [2021-11-25 19:33:21,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 868 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=735, Invalid=1335, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:33:21,954 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 302 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:33:21,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 84 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:33:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-25 19:33:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2021-11-25 19:33:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 410 states have (on average 1.0829268292682928) internal successors, (444), 410 states have internal predecessors, (444), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:33:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 448 transitions. [2021-11-25 19:33:22,199 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 448 transitions. Word has length 302 [2021-11-25 19:33:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:33:22,200 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 448 transitions. [2021-11-25 19:33:22,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:33:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 448 transitions. [2021-11-25 19:33:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-25 19:33:22,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:33:22,207 INFO L514 BasicCegarLoop]: trace histogram [230, 88, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:33:22,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:33:22,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:33:22,431 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:33:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:33:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash -501681937, now seen corresponding path program 12 times [2021-11-25 19:33:22,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:33:22,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634064118] [2021-11-25 19:33:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:33:22,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:33:22,498 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:33:22,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107743436] [2021-11-25 19:33:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:33:22,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:33:22,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:33:22,502 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:33:22,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:41:36,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:41:36,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:41:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 2842 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:41:36,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 31708 backedges. 2651 proven. 253 refuted. 0 times theorem prover too weak. 28804 trivial. 0 not checked. [2021-11-25 19:41:37,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:41:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31708 backedges. 2122 proven. 782 refuted. 0 times theorem prover too weak. 28804 trivial. 0 not checked. [2021-11-25 19:41:39,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634064118] [2021-11-25 19:41:39,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107743436] [2021-11-25 19:41:39,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107743436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:41:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1680770899] [2021-11-25 19:41:39,294 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:41:39,294 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:41:39,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:41:39,295 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:41:39,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:41:39,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,373 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:41:39,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:41:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2021-11-25 19:41:39,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:41:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,747 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:41:39,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:41:39,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:39,932 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-25 19:41:39,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 209 [2021-11-25 19:41:39,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:40,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:40,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 19:41:40,091 INFO L354 Elim1Store]: treesize reduction 49, result has 27.9 percent of original size [2021-11-25 19:41:40,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2021-11-25 19:41:40,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:40,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:40,208 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:41:40,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:41:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:40,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:40,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:40,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:40,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:40,307 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-25 19:41:40,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 141 [2021-11-25 19:41:40,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:40,360 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:41:40,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:41:40,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:40,402 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:41:40,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:41:40,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:40,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:40,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:41:40,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:40,705 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:41:40,760 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:41:41,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18501#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:41:41,933 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:41:41,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:41:41,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-25 19:41:41,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124333728] [2021-11-25 19:41:41,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:41:41,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-25 19:41:41,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:41:41,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-25 19:41:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1364, Invalid=2058, Unknown=0, NotChecked=0, Total=3422 [2021-11-25 19:41:41,937 INFO L87 Difference]: Start difference. First operand 414 states and 448 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:41:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:41:44,534 INFO L93 Difference]: Finished difference Result 816 states and 975 transitions. [2021-11-25 19:41:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 19:41:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 350 [2021-11-25 19:41:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:41:44,540 INFO L225 Difference]: With dead ends: 816 [2021-11-25 19:41:44,540 INFO L226 Difference]: Without dead ends: 673 [2021-11-25 19:41:44,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 988 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2583, Invalid=4059, Unknown=0, NotChecked=0, Total=6642 [2021-11-25 19:41:44,544 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 746 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:41:44,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 158 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:41:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-11-25 19:41:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 582. [2021-11-25 19:41:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 578 states have (on average 1.1003460207612457) internal successors, (636), 578 states have internal predecessors, (636), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:41:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 640 transitions. [2021-11-25 19:41:44,877 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 640 transitions. Word has length 350 [2021-11-25 19:41:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:41:44,878 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 640 transitions. [2021-11-25 19:41:44,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:41:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 640 transitions. [2021-11-25 19:41:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-25 19:41:44,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:41:44,881 INFO L514 BasicCegarLoop]: trace histogram [230, 184, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:41:45,081 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forcibly destroying the process [2021-11-25 19:41:45,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 137 [2021-11-25 19:41:45,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:41:45,124 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:41:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:41:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash 560191727, now seen corresponding path program 13 times [2021-11-25 19:41:45,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:41:45,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005176918] [2021-11-25 19:41:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:41:45,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:41:45,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:41:45,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253380749] [2021-11-25 19:41:45,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:41:45,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:41:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:41:45,244 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:41:45,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:41:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:41:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 3514 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 19:41:46,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:41:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 45100 backedges. 8841 proven. 1081 refuted. 0 times theorem prover too weak. 35178 trivial. 0 not checked. [2021-11-25 19:41:47,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:41:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 45100 backedges. 8841 proven. 1081 refuted. 0 times theorem prover too weak. 35178 trivial. 0 not checked. [2021-11-25 19:41:53,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:41:53,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005176918] [2021-11-25 19:41:53,195 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:41:53,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253380749] [2021-11-25 19:41:53,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253380749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:41:53,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266224695] [2021-11-25 19:41:53,198 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:41:53,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:41:53,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:41:53,199 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:41:53,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:41:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,278 INFO L354 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2021-11-25 19:41:53,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2021-11-25 19:41:53,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,348 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:41:53,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 19:41:53,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-25 19:41:53,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,702 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-25 19:41:53,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 391 treesize of output 374 [2021-11-25 19:41:53,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:53,894 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 19:41:53,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 213 [2021-11-25 19:41:53,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:53,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:54,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:41:54,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:54,097 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-25 19:41:54,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-25 19:41:54,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:54,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:54,221 INFO L354 Elim1Store]: treesize reduction 188, result has 23.6 percent of original size [2021-11-25 19:41:54,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 147 [2021-11-25 19:41:54,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:54,353 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:41:54,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:41:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:41:54,458 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:41:54,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-25 19:41:54,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:41:54,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 106 [2021-11-25 19:41:54,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:41:54,680 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2021-11-25 19:41:54,736 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:42:07,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23904#(and (= |ULTIMATE.start_main_~i~0#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~mem6#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~q~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (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~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~s~0#1| 700) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:42:07,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:42:07,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:42:07,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2021-11-25 19:42:07,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882953053] [2021-11-25 19:42:07,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:42:07,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-25 19:42:07,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:42:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-25 19:42:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4980, Invalid=6150, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 19:42:07,193 INFO L87 Difference]: Start difference. First operand 582 states and 640 transitions. Second operand has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:42:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:42:20,821 INFO L93 Difference]: Finished difference Result 2117 states and 2714 transitions. [2021-11-25 19:42:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-25 19:42:20,823 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 446 [2021-11-25 19:42:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:42:20,832 INFO L225 Difference]: With dead ends: 2117 [2021-11-25 19:42:20,832 INFO L226 Difference]: Without dead ends: 1589 [2021-11-25 19:42:20,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1383 GetRequests, 1036 SyntacticMatches, 196 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34478 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=9727, Invalid=13529, Unknown=0, NotChecked=0, Total=23256 [2021-11-25 19:42:20,841 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2176 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 1909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2176 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1909 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:42:20,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2176 Valid, 305 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1909 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 19:42:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-11-25 19:42:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 822. [2021-11-25 19:42:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 818 states have (on average 1.0709046454767726) internal successors, (876), 818 states have internal predecessors, (876), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:42:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 880 transitions. [2021-11-25 19:42:21,294 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 880 transitions. Word has length 446 [2021-11-25 19:42:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:42:21,294 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 880 transitions. [2021-11-25 19:42:21,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:42:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 880 transitions. [2021-11-25 19:42:21,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2021-11-25 19:42:21,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:42:21,299 INFO L514 BasicCegarLoop]: trace histogram [470, 184, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:42:21,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:42:21,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:42:21,499 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:42:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:42:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash -819343377, now seen corresponding path program 14 times [2021-11-25 19:42:21,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:42:21,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469695585] [2021-11-25 19:42:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:42:21,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:42:21,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:42:21,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546025053] [2021-11-25 19:42:21,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:42:21,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:42:21,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:42:21,670 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:42:21,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2acb720-a5d5-4330-85f2-0c76dd686f08/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process