./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array21_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array21_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur --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 f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:16:41,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:16:41,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:16:41,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:16:41,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:16:41,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:16:41,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:16:41,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:16:41,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:16:41,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:16:41,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:16:41,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:16:41,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:16:41,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:16:41,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:16:41,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:16:41,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:16:41,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:16:41,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:16:41,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:16:41,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:16:41,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:16:41,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:16:41,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:16:41,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:16:41,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:16:41,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:16:41,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:16:41,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:16:41,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:16:41,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:16:41,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:16:41,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:16:41,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:16:41,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:16:41,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:16:41,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:16:41,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:16:41,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:16:41,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:16:41,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:16:41,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:16:41,729 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:16:41,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:16:41,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:16:41,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:16:41,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:16:41,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:16:41,732 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:16:41,732 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:16:41,732 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:16:41,732 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:16:41,734 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:16:41,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:16:41,734 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:16:41,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:16:41,735 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:16:41,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:16:41,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:16:41,736 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:16:41,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:16:41,737 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:16:41,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:16:41,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:16:41,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:16:41,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:16:41,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:16:41,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:16:41,740 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:16:41,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:16:41,740 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:16:41,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:16:41,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:16:41,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:16:41,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:16:41,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:16:41,742 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:16:41,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:16:41,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:16:41,743 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:16:41,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:16:41,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:16:41,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:16:41,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 [2022-11-25 23:16:42,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:16:42,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:16:42,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:16:42,183 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:16:42,184 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:16:42,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-patterns/array21_pattern.c [2022-11-25 23:16:45,997 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:16:46,220 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:16:46,221 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/sv-benchmarks/c/array-patterns/array21_pattern.c [2022-11-25 23:16:46,230 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/data/3ede1811a/5a8744575e884bf591bab4f9cfb71752/FLAG1224c62d7 [2022-11-25 23:16:46,253 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/data/3ede1811a/5a8744575e884bf591bab4f9cfb71752 [2022-11-25 23:16:46,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:16:46,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:16:46,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:16:46,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:16:46,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:16:46,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e8b2b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46, skipping insertion in model container [2022-11-25 23:16:46,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:16:46,315 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:16:46,491 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2022-11-25 23:16:46,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:16:46,535 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:16:46,560 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2022-11-25 23:16:46,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:16:46,609 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:16:46,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46 WrapperNode [2022-11-25 23:16:46,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:16:46,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:16:46,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:16:46,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:16:46,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,688 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2022-11-25 23:16:46,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:16:46,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:16:46,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:16:46,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:16:46,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:16:46,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:16:46,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:16:46,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:16:46,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (1/1) ... [2022-11-25 23:16:46,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:16:46,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:46,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:16:46,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:16:46,864 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2022-11-25 23:16:46,865 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2022-11-25 23:16:46,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:16:46,865 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 23:16:46,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 23:16:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:16:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:16:46,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:16:46,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:16:46,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:16:46,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:16:46,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:16:47,001 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:16:47,006 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:16:47,318 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:16:47,433 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:16:47,434 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 23:16:47,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:16:47 BoogieIcfgContainer [2022-11-25 23:16:47,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:16:47,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:16:47,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:16:47,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:16:47,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:16:46" (1/3) ... [2022-11-25 23:16:47,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:16:47, skipping insertion in model container [2022-11-25 23:16:47,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:16:46" (2/3) ... [2022-11-25 23:16:47,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d5dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:16:47, skipping insertion in model container [2022-11-25 23:16:47,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:16:47" (3/3) ... [2022-11-25 23:16:47,465 INFO L112 eAbstractionObserver]: Analyzing ICFG array21_pattern.c [2022-11-25 23:16:47,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:16:47,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:16:47,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:16:47,573 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@78744b4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:16:47,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:16:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:16:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:16:47,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:47,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:47,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:47,596 INFO L85 PathProgramCache]: Analyzing trace with hash -445405455, now seen corresponding path program 1 times [2022-11-25 23:16:47,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:47,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496979803] [2022-11-25 23:16:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:47,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:47,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:16:47,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063243283] [2022-11-25 23:16:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:47,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:47,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:47,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:47,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:16:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 23:16:47,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:16:47,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:16:47,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496979803] [2022-11-25 23:16:47,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:16:47,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063243283] [2022-11-25 23:16:47,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063243283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:16:47,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:16:47,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:16:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500977903] [2022-11-25 23:16:47,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:47,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:16:47,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:16:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:16:47,989 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:16:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:48,041 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-11-25 23:16:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:16:48,049 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-25 23:16:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:48,059 INFO L225 Difference]: With dead ends: 35 [2022-11-25 23:16:48,059 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 23:16:48,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:16:48,070 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:48,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:16:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 23:16:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-25 23:16:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:16:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-11-25 23:16:48,127 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 11 [2022-11-25 23:16:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:48,128 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-11-25 23:16:48,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 23:16:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-11-25 23:16:48,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:16:48,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:48,132 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:48,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:16:48,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:48,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:48,341 INFO L85 PathProgramCache]: Analyzing trace with hash -369278382, now seen corresponding path program 1 times [2022-11-25 23:16:48,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:48,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713945246] [2022-11-25 23:16:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:48,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:48,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:16:48,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687690265] [2022-11-25 23:16:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:48,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:48,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:48,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:48,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:16:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:48,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:16:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:16:48,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:16:48,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713945246] [2022-11-25 23:16:48,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:16:48,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687690265] [2022-11-25 23:16:48,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687690265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:16:48,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:16:48,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:16:48,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829223954] [2022-11-25 23:16:48,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:48,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:16:48,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:16:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:16:48,623 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:16:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:48,776 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-11-25 23:16:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:16:48,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2022-11-25 23:16:48,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:48,778 INFO L225 Difference]: With dead ends: 51 [2022-11-25 23:16:48,779 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 23:16:48,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:16:48,781 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:48,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 41 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:16:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 23:16:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-11-25 23:16:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:16:48,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-25 23:16:48,795 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 24 [2022-11-25 23:16:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:48,796 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-25 23:16:48,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:16:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-25 23:16:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:16:48,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:48,798 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:48,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:48,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:48,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:49,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2038583436, now seen corresponding path program 1 times [2022-11-25 23:16:49,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:49,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418237146] [2022-11-25 23:16:49,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:49,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:49,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:16:49,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862572445] [2022-11-25 23:16:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:49,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:49,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:49,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:49,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:16:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:49,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:16:49,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:16:49,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:16:49,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:49,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418237146] [2022-11-25 23:16:49,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:16:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862572445] [2022-11-25 23:16:49,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862572445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:16:49,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:16:49,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:16:49,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468294438] [2022-11-25 23:16:49,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:16:49,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:16:49,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:16:49,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:16:49,193 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:16:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:49,279 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2022-11-25 23:16:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:16:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-11-25 23:16:49,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:49,281 INFO L225 Difference]: With dead ends: 54 [2022-11-25 23:16:49,282 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 23:16:49,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:16:49,285 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:49,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 47 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:16:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 23:16:49,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 23:16:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:16:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-25 23:16:49,307 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2022-11-25 23:16:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:49,308 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-25 23:16:49,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:16:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-25 23:16:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:16:49,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:49,310 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:49,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:49,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:49,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1737391081, now seen corresponding path program 1 times [2022-11-25 23:16:49,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:49,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577317732] [2022-11-25 23:16:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:49,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:49,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:16:49,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383218055] [2022-11-25 23:16:49,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:49,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:49,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:49,543 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:49,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:16:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:16:49,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:16:49,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:16:49,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:16:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:16:49,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577317732] [2022-11-25 23:16:49,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:16:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383218055] [2022-11-25 23:16:49,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383218055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:16:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163649531] [2022-11-25 23:16:49,982 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:16:49,982 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:16:49,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:16:49,994 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:16:49,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:16:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:50,269 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-25 23:16:50,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-25 23:16:50,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:50,378 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:16:50,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:16:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:50,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-25 23:16:50,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:50,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:16:50,766 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 23:16:50,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 277 treesize of output 280 [2022-11-25 23:16:50,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:51,192 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-25 23:16:51,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 157 [2022-11-25 23:16:51,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:51,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:16:51,405 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:16:51,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:16:51,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:51,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-25 23:16:52,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:16:52,431 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:16:52,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:16:52,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:52,531 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-25 23:16:52,534 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 37 for LOIs [2022-11-25 23:16:52,555 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:16:54,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '748#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (+ |ULTIMATE.start_main_~sum~0#1| 4) (* ~ARR_SIZE~0 4)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:16:54,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:16:54,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:16:54,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-25 23:16:54,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104880898] [2022-11-25 23:16:54,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:16:54,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:16:54,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:16:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:16:54,814 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:16:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:54,952 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-11-25 23:16:54,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:16:54,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 30 [2022-11-25 23:16:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:54,954 INFO L225 Difference]: With dead ends: 58 [2022-11-25 23:16:54,954 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 23:16:54,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:16:54,956 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:54,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 52 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:16:54,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 23:16:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-25 23:16:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:16:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-11-25 23:16:54,966 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2022-11-25 23:16:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:54,966 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-11-25 23:16:54,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 23:16:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-11-25 23:16:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 23:16:54,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:54,969 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:54,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:55,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:55,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash 737507988, now seen corresponding path program 2 times [2022-11-25 23:16:55,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:55,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917171299] [2022-11-25 23:16:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:55,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:55,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:16:55,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396970004] [2022-11-25 23:16:55,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:16:55,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:55,199 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:16:55,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:16:55,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:16:55,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:16:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:16:55,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:16:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:16:55,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:16:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 23:16:55,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:16:55,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917171299] [2022-11-25 23:16:55,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:16:55,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396970004] [2022-11-25 23:16:55,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396970004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:16:55,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952106571] [2022-11-25 23:16:55,907 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:16:55,909 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:16:55,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:16:55,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:16:55,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:16:55,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:56,027 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-25 23:16:56,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-25 23:16:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:56,104 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:16:56,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:16:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:56,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 23:16:56,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:56,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:56,280 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 23:16:56,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-25 23:16:56,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:56,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:16:56,465 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-25 23:16:56,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 157 [2022-11-25 23:16:56,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:56,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:56,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 77 [2022-11-25 23:16:56,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:56,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-25 23:16:57,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:57,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 77 [2022-11-25 23:16:57,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:16:57,321 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-25 23:16:57,323 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 37 for LOIs [2022-11-25 23:16:57,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:16:59,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1115#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (+ |ULTIMATE.start_main_~sum~0#1| 4) (* ~ARR_SIZE~0 4)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:16:59,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:16:59,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:16:59,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-11-25 23:16:59,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654718489] [2022-11-25 23:16:59,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:16:59,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:16:59,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:16:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:16:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:16:59,486 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 23:16:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:16:59,757 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2022-11-25 23:16:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:16:59,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 32 [2022-11-25 23:16:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:16:59,759 INFO L225 Difference]: With dead ends: 70 [2022-11-25 23:16:59,759 INFO L226 Difference]: Without dead ends: 47 [2022-11-25 23:16:59,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:16:59,764 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:16:59,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 53 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:16:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-25 23:16:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-11-25 23:16:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 23:16:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-11-25 23:16:59,774 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 32 [2022-11-25 23:16:59,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:16:59,775 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-11-25 23:16:59,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 23:16:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-11-25 23:16:59,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:16:59,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:16:59,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:16:59,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:16:59,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:59,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:16:59,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:16:59,979 INFO L85 PathProgramCache]: Analyzing trace with hash -68836906, now seen corresponding path program 3 times [2022-11-25 23:16:59,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:16:59,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169775529] [2022-11-25 23:16:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:16:59,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:16:59,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:16:59,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863127169] [2022-11-25 23:16:59,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:16:59,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:16:59,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:16:59,998 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:00,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:17:00,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:17:00,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:00,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-25 23:17:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:00,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:00,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-11-25 23:17:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:00,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:17:00,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 55 [2022-11-25 23:17:00,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:00,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:00,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:00,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:00,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:00,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:17:00,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-25 23:17:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:01,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:01,661 INFO L321 Elim1Store]: treesize reduction 97, result has 49.2 percent of original size [2022-11-25 23:17:01,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 122 [2022-11-25 23:17:04,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:04,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:04,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:04,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:04,491 INFO L321 Elim1Store]: treesize reduction 196, result has 29.7 percent of original size [2022-11-25 23:17:04,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 224 treesize of output 146 [2022-11-25 23:17:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:17:05,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:10,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:10,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169775529] [2022-11-25 23:17:10,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:17:10,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863127169] [2022-11-25 23:17:10,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863127169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:17:10,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [93982846] [2022-11-25 23:17:10,491 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:17:10,491 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:10,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:10,492 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:10,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:10,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:10,585 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:17:10,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:17:10,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:10,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-25 23:17:10,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:10,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-25 23:17:10,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:10,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:10,804 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 23:17:10,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 277 treesize of output 280 [2022-11-25 23:17:10,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:11,046 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-25 23:17:11,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 157 [2022-11-25 23:17:11,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:11,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:11,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 77 [2022-11-25 23:17:11,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:11,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-25 23:17:11,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:11,760 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:17:11,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:17:11,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:11,810 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-25 23:17:11,812 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 37 for LOIs [2022-11-25 23:17:11,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:15,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1534#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (+ |ULTIMATE.start_main_~sum~0#1| 4) (* ~ARR_SIZE~0 4)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:15,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:15,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:17:15,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-25 23:17:15,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048728693] [2022-11-25 23:17:15,908 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:15,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:17:15,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:17:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3227, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 23:17:15,912 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:17:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:18,287 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2022-11-25 23:17:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:17:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-11-25 23:17:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:18,291 INFO L225 Difference]: With dead ends: 101 [2022-11-25 23:17:18,291 INFO L226 Difference]: Without dead ends: 98 [2022-11-25 23:17:18,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=348, Invalid=3558, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 23:17:18,294 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:18,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 207 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 23:17:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-25 23:17:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2022-11-25 23:17:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 55 states have internal predecessors, (69), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 23:17:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2022-11-25 23:17:18,326 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 40 [2022-11-25 23:17:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:18,326 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2022-11-25 23:17:18,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:17:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2022-11-25 23:17:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:17:18,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:18,328 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:18,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:18,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:17:18,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1075120508, now seen corresponding path program 4 times [2022-11-25 23:17:18,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:18,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197961557] [2022-11-25 23:17:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:18,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:18,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:17:18,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407952509] [2022-11-25 23:17:18,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:17:18,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:18,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:18,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:18,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:17:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:18,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:17:18,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 23:17:18,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:17:18,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:18,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197961557] [2022-11-25 23:17:18,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:17:18,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407952509] [2022-11-25 23:17:18,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407952509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178589046] [2022-11-25 23:17:18,891 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:17:18,892 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:18,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:18,892 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:18,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,977 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:17:18,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:17:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:18,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-25 23:17:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:19,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 23:17:19,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:19,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:19,143 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 23:17:19,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-25 23:17:19,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:19,375 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-25 23:17:19,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 150 [2022-11-25 23:17:19,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:19,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:19,522 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:17:19,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:17:19,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:19,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-25 23:17:20,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:20,146 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:17:20,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:17:20,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:20,221 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-25 23:17:20,223 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 37 for LOIs [2022-11-25 23:17:20,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:22,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2096#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (+ |ULTIMATE.start_main_~sum~0#1| 4) (* ~ARR_SIZE~0 4)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:22,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:22,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:17:22,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-25 23:17:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669431694] [2022-11-25 23:17:22,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:22,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:17:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:17:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:17:22,078 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:17:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:22,422 INFO L93 Difference]: Finished difference Result 178 states and 230 transitions. [2022-11-25 23:17:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:17:22,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-25 23:17:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:22,433 INFO L225 Difference]: With dead ends: 178 [2022-11-25 23:17:22,433 INFO L226 Difference]: Without dead ends: 121 [2022-11-25 23:17:22,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:17:22,436 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:22,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 80 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:17:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-25 23:17:22,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2022-11-25 23:17:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:17:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2022-11-25 23:17:22,508 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 41 [2022-11-25 23:17:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:22,509 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2022-11-25 23:17:22,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:17:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2022-11-25 23:17:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:17:22,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:22,511 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:22,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 23:17:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:22,716 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1714144321, now seen corresponding path program 5 times [2022-11-25 23:17:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:22,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578393006] [2022-11-25 23:17:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:22,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:22,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:17:22,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033690399] [2022-11-25 23:17:22,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:17:22,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:22,733 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:22,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:17:23,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 23:17:23,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:17:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 23:17:23,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:17:23,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578393006] [2022-11-25 23:17:23,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:17:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033690399] [2022-11-25 23:17:23,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033690399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:23,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280138552] [2022-11-25 23:17:23,952 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:17:23,952 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:23,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:23,953 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:23,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:23,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,059 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-25 23:17:24,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-25 23:17:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,145 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:17:24,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:17:24,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 23:17:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,306 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 23:17:24,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-25 23:17:24,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:24,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:24,471 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-25 23:17:24,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 157 [2022-11-25 23:17:24,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:24,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:24,579 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:17:24,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:17:24,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:24,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-25 23:17:25,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:25,138 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:17:25,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:17:25,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:25,193 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-25 23:17:25,194 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 37 for LOIs [2022-11-25 23:17:25,209 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:27,034 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2837#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (+ |ULTIMATE.start_main_~sum~0#1| 4) (* ~ARR_SIZE~0 4)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:27,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:27,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:17:27,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-25 23:17:27,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485836287] [2022-11-25 23:17:27,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:27,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:17:27,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:27,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:17:27,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:17:27,038 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:17:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:27,300 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2022-11-25 23:17:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:17:27,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-25 23:17:27,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:27,303 INFO L225 Difference]: With dead ends: 126 [2022-11-25 23:17:27,303 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 23:17:27,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:17:27,308 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 37 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:27,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 130 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:17:27,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 23:17:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2022-11-25 23:17:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 72 states have internal predecessors, (86), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 23:17:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-11-25 23:17:27,357 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 41 [2022-11-25 23:17:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:27,358 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-11-25 23:17:27,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:17:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-11-25 23:17:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:17:27,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:27,360 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:27,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:27,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:27,569 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:27,569 INFO L85 PathProgramCache]: Analyzing trace with hash 705951226, now seen corresponding path program 1 times [2022-11-25 23:17:27,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:27,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692375917] [2022-11-25 23:17:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:27,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:27,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:17:27,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444972757] [2022-11-25 23:17:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:27,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:27,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:27,621 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:27,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:17:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:27,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:17:27,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 23:17:28,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 23:17:28,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692375917] [2022-11-25 23:17:28,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:17:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444972757] [2022-11-25 23:17:28,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444972757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831618581] [2022-11-25 23:17:28,363 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-25 23:17:28,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:28,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:28,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:28,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,432 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:17:28,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:17:28,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-25 23:17:28,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-25 23:17:28,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:17:28,654 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-25 23:17:28,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 277 treesize of output 280 [2022-11-25 23:17:28,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:28,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:28,898 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-25 23:17:28,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 157 [2022-11-25 23:17:28,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:28,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:29,012 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:17:29,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:17:29,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:29,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 37 [2022-11-25 23:17:29,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:29,630 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:17:29,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:17:29,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:29,670 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-25 23:17:29,672 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 44 for LOIs [2022-11-25 23:17:29,690 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:32,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3509#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (+ |ULTIMATE.start_main_~sum~0#1| 4) (* ~ARR_SIZE~0 4)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:32,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:32,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:17:32,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-11-25 23:17:32,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099694631] [2022-11-25 23:17:32,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:32,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:17:32,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:17:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:17:32,426 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-25 23:17:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:33,051 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2022-11-25 23:17:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:17:33,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 44 [2022-11-25 23:17:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:33,052 INFO L225 Difference]: With dead ends: 123 [2022-11-25 23:17:33,053 INFO L226 Difference]: Without dead ends: 93 [2022-11-25 23:17:33,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=328, Invalid=2752, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:17:33,055 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:33,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 126 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:17:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-25 23:17:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-11-25 23:17:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 23:17:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-11-25 23:17:33,086 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 44 [2022-11-25 23:17:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:33,086 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-11-25 23:17:33,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-25 23:17:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-11-25 23:17:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:17:33,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:33,088 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:33,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:33,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 23:17:33,295 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:33,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:33,295 INFO L85 PathProgramCache]: Analyzing trace with hash 671013880, now seen corresponding path program 6 times [2022-11-25 23:17:33,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:33,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423627247] [2022-11-25 23:17:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:33,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:33,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:17:33,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403681114] [2022-11-25 23:17:33,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:17:33,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:33,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:33,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:17:33,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:17:33,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:17:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:17:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:17:33,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:17:33,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423627247] [2022-11-25 23:17:33,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:17:33,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403681114] [2022-11-25 23:17:33,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403681114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:33,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627435205] [2022-11-25 23:17:33,608 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:17:33,608 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:33,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:33,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:33,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:33,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:33,678 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:17:33,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:17:33,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:33,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-25 23:17:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:33,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 23:17:33,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:33,866 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 23:17:33,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-25 23:17:33,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:34,053 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-25 23:17:34,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 157 [2022-11-25 23:17:34,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:34,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:34,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 77 [2022-11-25 23:17:34,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:34,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-25 23:17:34,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:34,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 77 [2022-11-25 23:17:34,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:34,647 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-25 23:17:34,649 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 37 for LOIs [2022-11-25 23:17:34,659 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:36,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4178#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (+ |ULTIMATE.start_main_~sum~0#1| 4) (* ~ARR_SIZE~0 4)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:36,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:36,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:17:36,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-25 23:17:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051058082] [2022-11-25 23:17:36,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:36,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 23:17:36,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:36,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 23:17:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:17:36,394 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:17:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:36,739 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2022-11-25 23:17:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:17:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-11-25 23:17:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:36,744 INFO L225 Difference]: With dead ends: 104 [2022-11-25 23:17:36,744 INFO L226 Difference]: Without dead ends: 87 [2022-11-25 23:17:36,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:17:36,747 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:36,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 91 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:17:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-25 23:17:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-11-25 23:17:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 23:17:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-11-25 23:17:36,799 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 44 [2022-11-25 23:17:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:36,800 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-11-25 23:17:36,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:17:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-11-25 23:17:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:17:36,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:36,802 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:36,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:37,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:17:37,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1757907762, now seen corresponding path program 7 times [2022-11-25 23:17:37,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:37,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795587000] [2022-11-25 23:17:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:37,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:37,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:17:37,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913517793] [2022-11-25 23:17:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:17:37,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:37,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:37,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:37,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:17:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:17:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 23:17:37,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:17:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 23:17:37,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:17:37,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795587000] [2022-11-25 23:17:37,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:17:37,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913517793] [2022-11-25 23:17:37,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913517793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:17:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834903083] [2022-11-25 23:17:37,335 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:17:37,335 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:17:37,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:17:37,336 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:17:37,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:17:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,405 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:17:37,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:17:37,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-25 23:17:37,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-25 23:17:37,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,563 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-25 23:17:37,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-25 23:17:37,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:37,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:17:37,716 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-25 23:17:37,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 150 [2022-11-25 23:17:37,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:37,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:37,829 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-25 23:17:37,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 82 [2022-11-25 23:17:37,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:38,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-25 23:17:38,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:38,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 77 [2022-11-25 23:17:38,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-25 23:17:38,409 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-25 23:17:38,410 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 37 for LOIs [2022-11-25 23:17:38,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:17:40,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4809#(and (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= (+ |ULTIMATE.start_main_~sum~0#1| 4) (* ~ARR_SIZE~0 4)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:17:40,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:17:40,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:17:40,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-25 23:17:40,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900903730] [2022-11-25 23:17:40,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:17:40,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:17:40,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:17:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:17:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:17:40,312 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:17:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:17:40,618 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2022-11-25 23:17:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:17:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-11-25 23:17:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:17:40,620 INFO L225 Difference]: With dead ends: 131 [2022-11-25 23:17:40,620 INFO L226 Difference]: Without dead ends: 102 [2022-11-25 23:17:40,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 23:17:40,622 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:17:40,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 132 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:17:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-25 23:17:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-11-25 23:17:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 states have internal predecessors, (88), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 23:17:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2022-11-25 23:17:40,651 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 44 [2022-11-25 23:17:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:17:40,651 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2022-11-25 23:17:40,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:17:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2022-11-25 23:17:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 23:17:40,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:17:40,653 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:17:40,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:17:40,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:40,855 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:17:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:17:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash 172129101, now seen corresponding path program 1 times [2022-11-25 23:17:40,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:17:40,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611307509] [2022-11-25 23:17:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:40,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:17:40,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:17:40,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139798885] [2022-11-25 23:17:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:17:40,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:17:40,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:17:40,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:17:40,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a45f7612-d4ae-4773-aa05-d0cb2f242e6e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:17:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:17:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-25 23:17:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:17:41,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 23:17:41,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-11-25 23:17:41,622 INFO L321 Elim1Store]: treesize reduction 57, result has 36.0 percent of original size [2022-11-25 23:17:41,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 51 [2022-11-25 23:17:41,698 INFO L321 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2022-11-25 23:17:41,699 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 44 treesize of output 49 [2022-11-25 23:17:51,610 INFO L321 Elim1Store]: treesize reduction 147, result has 39.0 percent of original size [2022-11-25 23:17:51,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 124 [2022-11-25 23:18:03,141 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:18:27,823 WARN L233 SmtUtils]: Spent 21.92s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:18:54,297 WARN L233 SmtUtils]: Spent 21.20s on a formula simplification. DAG size of input: 107 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:19:12,414 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:19:14,841 INFO L321 Elim1Store]: treesize reduction 618, result has 28.5 percent of original size [2022-11-25 23:19:14,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 235 treesize of output 318 [2022-11-25 23:20:13,902 WARN L233 SmtUtils]: Spent 41.59s on a formula simplification. DAG size of input: 544 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:20:30,645 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:20:38,441 WARN L233 SmtUtils]: Spent 7.13s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:20:53,661 WARN L233 SmtUtils]: Spent 12.47s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:21:02,759 WARN L233 SmtUtils]: Spent 8.35s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:21:18,950 WARN L233 SmtUtils]: Spent 7.92s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:21:34,962 WARN L233 SmtUtils]: Spent 15.75s on a formula simplification. DAG size of input: 1348 DAG size of output: 360 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 23:21:34,971 INFO L321 Elim1Store]: treesize reduction 6246, result has 17.4 percent of original size [2022-11-25 23:21:34,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 39 select indices, 39 select index equivalence classes, 0 disjoint index pairs (out of 741 index pairs), introduced 39 new quantified variables, introduced 741 case distinctions, treesize of input 1079 treesize of output 1645