./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0 --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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- 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-e04fb08 [2022-11-16 20:20:10,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:20:10,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:20:10,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:20:10,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:20:10,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:20:10,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:20:10,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:20:10,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:20:10,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:20:10,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:20:10,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:20:10,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:20:10,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:20:10,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:20:10,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:20:10,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:20:10,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:20:10,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:20:10,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:20:10,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:20:10,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:20:10,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:20:10,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:20:10,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:20:10,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:20:10,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:20:10,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:20:10,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:20:10,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:20:10,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:20:10,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:20:10,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:20:10,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:20:10,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:20:10,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:20:10,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:20:10,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:20:10,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:20:10,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:20:10,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:20:10,585 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:20:10,621 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:20:10,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:20:10,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:20:10,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:20:10,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:20:10,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:20:10,623 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:20:10,623 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:20:10,623 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:20:10,623 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:20:10,624 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:20:10,624 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:20:10,624 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:20:10,624 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:20:10,624 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:20:10,625 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:20:10,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:20:10,625 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:20:10,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:20:10,626 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:20:10,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:20:10,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:20:10,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:20:10,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:20:10,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:20:10,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:20:10,627 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:20:10,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:20:10,628 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:20:10,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:20:10,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:20:10,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:20:10,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:20:10,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:20:10,629 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:20:10,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:20:10,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:20:10,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:20:10,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:20:10,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:20:10,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:20:10,631 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_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2022-11-16 20:20:10,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:20:10,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:20:10,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:20:10,940 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:20:10,940 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:20:10,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2022-11-16 20:20:11,019 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/data/a1aadabe6/6ef0ab3caa004096812a6fb85913dd12/FLAG5f304b36f [2022-11-16 20:20:11,567 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:20:11,567 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/sv-benchmarks/c/array-patterns/array4_pattern.c [2022-11-16 20:20:11,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/data/a1aadabe6/6ef0ab3caa004096812a6fb85913dd12/FLAG5f304b36f [2022-11-16 20:20:11,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/data/a1aadabe6/6ef0ab3caa004096812a6fb85913dd12 [2022-11-16 20:20:11,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:20:11,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:20:11,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:20:11,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:20:11,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:20:11,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:20:11" (1/1) ... [2022-11-16 20:20:11,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bedd024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:11, skipping insertion in model container [2022-11-16 20:20:11,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:20:11" (1/1) ... [2022-11-16 20:20:11,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:20:11,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:20:12,165 WARN L229 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_f5487982-c726-45c7-a038-84d64e9cb3a1/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-11-16 20:20:12,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:20:12,195 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:20:12,208 WARN L229 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_f5487982-c726-45c7-a038-84d64e9cb3a1/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-11-16 20:20:12,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:20:12,232 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:20:12,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12 WrapperNode [2022-11-16 20:20:12,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:20:12,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:20:12,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:20:12,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:20:12,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,267 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2022-11-16 20:20:12,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:20:12,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:20:12,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:20:12,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:20:12,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:20:12,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:20:12,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:20:12,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:20:12,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (1/1) ... [2022-11-16 20:20:12,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:20:12,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:12,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:20:12,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:20:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:20:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:20:12,379 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:20:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:20:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:20:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:20:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:20:12,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:20:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:20:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:20:12,471 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:20:12,473 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:20:12,726 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:20:12,783 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:20:12,783 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 20:20:12,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:20:12 BoogieIcfgContainer [2022-11-16 20:20:12,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:20:12,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:20:12,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:20:12,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:20:12,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:20:11" (1/3) ... [2022-11-16 20:20:12,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acd4804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:20:12, skipping insertion in model container [2022-11-16 20:20:12,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:20:12" (2/3) ... [2022-11-16 20:20:12,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acd4804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:20:12, skipping insertion in model container [2022-11-16 20:20:12,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:20:12" (3/3) ... [2022-11-16 20:20:12,825 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2022-11-16 20:20:12,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:20:12,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:20:12,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:20:12,948 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;@67440b41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:20:12,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:20:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:20:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:20:12,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:12,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:12,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1119781689, now seen corresponding path program 1 times [2022-11-16 20:20:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:12,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275415331] [2022-11-16 20:20:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:12,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:20:13,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275415331] [2022-11-16 20:20:13,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275415331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:20:13,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:20:13,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:20:13,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811045908] [2022-11-16 20:20:13,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:20:13,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 20:20:13,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 20:20:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:20:13,289 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 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) [2022-11-16 20:20:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:13,363 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-11-16 20:20:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 20:20:13,366 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 [2022-11-16 20:20:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:13,377 INFO L225 Difference]: With dead ends: 29 [2022-11-16 20:20:13,377 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 20:20:13,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:20:13,386 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:13,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:20:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 20:20:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-16 20:20:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:20:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-16 20:20:13,442 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2022-11-16 20:20:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:13,444 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-16 20:20:13,444 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) [2022-11-16 20:20:13,445 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-16 20:20:13,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 20:20:13,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:13,450 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:13,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:20:13,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash -166120417, now seen corresponding path program 1 times [2022-11-16 20:20:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:13,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305692011] [2022-11-16 20:20:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:13,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:13,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185442416] [2022-11-16 20:20:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:13,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:13,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:13,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:13,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:20:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:20:13,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:20:13,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:20:13,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:13,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305692011] [2022-11-16 20:20:13,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:13,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185442416] [2022-11-16 20:20:13,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185442416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:20:13,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:20:13,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:20:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679496525] [2022-11-16 20:20:13,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:20:13,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:20:13,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:20:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:20:13,786 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:20:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:13,838 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-16 20:20:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:20:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2022-11-16 20:20:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:13,840 INFO L225 Difference]: With dead ends: 24 [2022-11-16 20:20:13,840 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 20:20:13,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:20:13,841 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:13,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:20:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 20:20:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-16 20:20:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:20:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-16 20:20:13,848 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 27 [2022-11-16 20:20:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:13,849 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-16 20:20:13,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:20:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-16 20:20:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 20:20:13,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:13,850 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:13,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 20:20:14,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:14,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:14,057 INFO L85 PathProgramCache]: Analyzing trace with hash -855080832, now seen corresponding path program 1 times [2022-11-16 20:20:14,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:14,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444369653] [2022-11-16 20:20:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:14,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:14,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:14,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560311817] [2022-11-16 20:20:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:14,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:14,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:14,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:14,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:20:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:14,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:20:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:20:14,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:20:14,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444369653] [2022-11-16 20:20:14,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:14,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560311817] [2022-11-16 20:20:14,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560311817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:20:14,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:20:14,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:20:14,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642843335] [2022-11-16 20:20:14,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:20:14,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:20:14,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:20:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:20:14,314 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:20:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:14,386 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-11-16 20:20:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:20:14,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-11-16 20:20:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:14,388 INFO L225 Difference]: With dead ends: 39 [2022-11-16 20:20:14,388 INFO L226 Difference]: Without dead ends: 22 [2022-11-16 20:20:14,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:20:14,390 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:14,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:20:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-16 20:20:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-16 20:20:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:20:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-16 20:20:14,396 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2022-11-16 20:20:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:14,396 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-16 20:20:14,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:20:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-16 20:20:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 20:20:14,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:14,397 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:14,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 20:20:14,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:14,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:14,604 INFO L85 PathProgramCache]: Analyzing trace with hash -70074783, now seen corresponding path program 1 times [2022-11-16 20:20:14,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:14,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141680616] [2022-11-16 20:20:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:14,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:14,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:14,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634255202] [2022-11-16 20:20:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:14,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:14,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:14,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:14,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:20:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:14,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 20:20:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:14,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:20:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:14,874 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 14 treesize of output 14 [2022-11-16 20:20:14,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:20:15,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:15,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 28 [2022-11-16 20:20:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:15,937 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 20:20:15,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 17 [2022-11-16 20:20:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:20:15,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:28,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:28,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141680616] [2022-11-16 20:20:28,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:28,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634255202] [2022-11-16 20:20:28,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634255202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:20:28,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1686632796] [2022-11-16 20:20:28,310 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:20:28,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:20:28,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:20:28,320 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:20:28,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:20:28,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,508 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:20:28,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:20:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:20:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:20:28,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:28,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:28,782 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:20:28,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:20:28,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:28,886 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:20:28,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:20:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:29,197 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:20:29,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:20:29,356 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:20:29,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:20:31,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '553#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:20:31,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:20:31,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:20:31,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-16 20:20:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064888481] [2022-11-16 20:20:31,711 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:20:31,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 20:20:31,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 20:20:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1218, Unknown=3, NotChecked=0, Total=1406 [2022-11-16 20:20:31,713 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 20:20:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:32,015 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-11-16 20:20:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 20:20:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-11-16 20:20:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:32,019 INFO L225 Difference]: With dead ends: 55 [2022-11-16 20:20:32,019 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 20:20:32,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=195, Invalid=1362, Unknown=3, NotChecked=0, Total=1560 [2022-11-16 20:20:32,021 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:32,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 92 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-16 20:20:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 20:20:32,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2022-11-16 20:20:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 20:20:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-11-16 20:20:32,034 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 29 [2022-11-16 20:20:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:32,035 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-11-16 20:20:32,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 20:20:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-11-16 20:20:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 20:20:32,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:32,036 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:32,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 20:20:32,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:32,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1504691040, now seen corresponding path program 2 times [2022-11-16 20:20:32,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:32,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280314076] [2022-11-16 20:20:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:32,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:32,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:32,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791555096] [2022-11-16 20:20:32,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:20:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:32,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:32,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:20:32,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 20:20:32,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:20:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:20:32,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:20:32,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:32,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280314076] [2022-11-16 20:20:32,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:32,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791555096] [2022-11-16 20:20:32,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791555096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:32,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314240693] [2022-11-16 20:20:32,563 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:20:32,563 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:20:32,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:20:32,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:20:32,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:20:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:32,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:32,689 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:20:32,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:20:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:32,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:32,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:20:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:32,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:20:32,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:32,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:32,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:32,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:32,989 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:20:32,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:20:33,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:33,267 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:20:33,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:20:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:33,508 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:20:33,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:20:33,665 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:20:33,666 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:20:35,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '900#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:20:35,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:20:35,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:20:35,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:20:35,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533206281] [2022-11-16 20:20:35,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:20:35,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:20:35,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:35,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:20:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:20:35,471 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:20:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:35,698 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-11-16 20:20:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:20:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2022-11-16 20:20:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:35,704 INFO L225 Difference]: With dead ends: 68 [2022-11-16 20:20:35,704 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 20:20:35,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-11-16 20:20:35,706 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:35,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 111 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:20:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 20:20:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-11-16 20:20:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 20:20:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2022-11-16 20:20:35,720 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 30 [2022-11-16 20:20:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:35,720 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2022-11-16 20:20:35,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:20:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2022-11-16 20:20:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 20:20:35,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:35,722 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:35,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 20:20:35,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:35,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:35,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2122333822, now seen corresponding path program 3 times [2022-11-16 20:20:35,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:35,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419840825] [2022-11-16 20:20:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:35,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:35,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:35,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389723673] [2022-11-16 20:20:35,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:20:35,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:35,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:35,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:36,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:20:36,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:20:36,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:36,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:20:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:20:36,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:20:36,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419840825] [2022-11-16 20:20:36,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389723673] [2022-11-16 20:20:36,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389723673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:36,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1552677073] [2022-11-16 20:20:36,248 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:20:36,248 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:20:36,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:20:36,249 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:20:36,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:20:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,380 INFO L321 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2022-11-16 20:20:36,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-16 20:20:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,510 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:20:36,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:20:36,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:20:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:36,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:36,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:36,717 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:20:36,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:20:36,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:36,831 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:20:36,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:20:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:37,065 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:20:37,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:20:37,224 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:20:37,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:20:39,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1285#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:20:39,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:20:39,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:20:39,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 20:20:39,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288523721] [2022-11-16 20:20:39,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:20:39,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 20:20:39,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 20:20:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-11-16 20:20:39,004 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:20:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:39,333 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2022-11-16 20:20:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:20:39,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2022-11-16 20:20:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:39,335 INFO L225 Difference]: With dead ends: 71 [2022-11-16 20:20:39,335 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 20:20:39,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-11-16 20:20:39,336 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:39,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 118 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:20:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 20:20:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2022-11-16 20:20:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 20:20:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-11-16 20:20:39,352 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 30 [2022-11-16 20:20:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:39,353 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-11-16 20:20:39,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:20:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-11-16 20:20:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 20:20:39,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:39,354 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:39,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:39,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:20:39,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:39,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash 598902815, now seen corresponding path program 4 times [2022-11-16 20:20:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:39,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174152502] [2022-11-16 20:20:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:39,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:39,583 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:39,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955055847] [2022-11-16 20:20:39,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:20:39,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:39,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:39,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:39,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:20:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:39,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-16 20:20:39,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:39,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:20:39,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:39,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 20:20:39,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-16 20:20:39,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:20:39,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:20:39,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:39,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:39,873 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 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-16 20:20:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:40,969 INFO L321 Elim1Store]: treesize reduction 64, result has 47.1 percent of original size [2022-11-16 20:20:40,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 93 [2022-11-16 20:20:41,347 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-16 20:20:41,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2022-11-16 20:20:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:20:41,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:41,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:41,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174152502] [2022-11-16 20:20:41,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:41,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955055847] [2022-11-16 20:20:41,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955055847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:20:41,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2156448] [2022-11-16 20:20:41,873 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:20:41,873 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:20:41,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:20:41,874 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:20:41,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:20:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:41,999 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:20:41,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:20:42,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:42,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:42,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:20:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:42,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:20:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:42,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:42,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:42,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:42,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:42,266 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:20:42,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:20:42,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:42,621 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:20:42,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:20:42,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:42,839 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:20:42,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:20:42,957 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:20:42,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:20:45,328 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1662#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:20:45,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:20:45,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:20:45,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-16 20:20:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717497553] [2022-11-16 20:20:45,328 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:20:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:20:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:20:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 20:20:45,330 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 20:20:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:46,229 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-11-16 20:20:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 20:20:46,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2022-11-16 20:20:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:46,230 INFO L225 Difference]: With dead ends: 84 [2022-11-16 20:20:46,230 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 20:20:46,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 20:20:46,232 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:46,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 147 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 414 Invalid, 0 Unknown, 165 Unchecked, 0.6s Time] [2022-11-16 20:20:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 20:20:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2022-11-16 20:20:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 20:20:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-11-16 20:20:46,262 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 31 [2022-11-16 20:20:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:46,262 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-11-16 20:20:46,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 20:20:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-11-16 20:20:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 20:20:46,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:46,263 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:46,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:46,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 20:20:46,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash 617181854, now seen corresponding path program 5 times [2022-11-16 20:20:46,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:46,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357120512] [2022-11-16 20:20:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:46,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:46,505 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:46,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620314569] [2022-11-16 20:20:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:20:46,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:46,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:46,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:46,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:20:46,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 20:20:46,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:46,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:20:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:20:46,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:20:46,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357120512] [2022-11-16 20:20:46,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620314569] [2022-11-16 20:20:46,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620314569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481828219] [2022-11-16 20:20:46,815 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:20:46,815 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:20:46,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:20:46,816 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:20:46,816 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:20:46,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:46,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:46,929 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:20:46,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:20:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:46,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:20:46,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:46,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:20:47,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:47,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:47,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:47,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:47,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:47,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:47,124 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:20:47,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:20:47,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:47,205 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:20:47,206 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:20:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:47,444 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:20:47,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:20:47,575 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:20:47,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:20:49,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2134#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:20:49,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:20:49,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:20:49,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 20:20:49,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357747467] [2022-11-16 20:20:49,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:20:49,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:20:49,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:20:49,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-11-16 20:20:49,286 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:20:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:49,726 INFO L93 Difference]: Finished difference Result 128 states and 161 transitions. [2022-11-16 20:20:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 20:20:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2022-11-16 20:20:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:49,728 INFO L225 Difference]: With dead ends: 128 [2022-11-16 20:20:49,728 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 20:20:49,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 20:20:49,729 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:49,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 138 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:20:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 20:20:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2022-11-16 20:20:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 20:20:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-11-16 20:20:49,753 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 32 [2022-11-16 20:20:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:49,753 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-11-16 20:20:49,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:20:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-11-16 20:20:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 20:20:49,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:49,754 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:49,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:49,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 20:20:49,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:49,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1385802880, now seen corresponding path program 6 times [2022-11-16 20:20:49,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:49,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169669534] [2022-11-16 20:20:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:49,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:49,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:50,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151652302] [2022-11-16 20:20:50,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:20:50,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:50,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:50,004 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:50,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:20:50,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:20:50,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:20:50,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 20:20:50,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:20:50,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:20:50,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:50,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169669534] [2022-11-16 20:20:50,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:50,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151652302] [2022-11-16 20:20:50,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151652302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:20:50,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [202355292] [2022-11-16 20:20:50,295 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:20:50,295 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:20:50,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:20:50,295 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:20:50,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:20:50,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:50,412 INFO L321 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2022-11-16 20:20:50,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-16 20:20:50,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:50,526 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:20:50,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:20:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:50,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:20:50,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:50,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:50,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:50,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:50,756 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:20:50,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:20:51,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:51,040 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:20:51,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:20:51,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:51,255 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:20:51,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:20:51,395 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:20:51,397 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:20:53,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2687#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:20:53,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:20:53,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:20:53,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 20:20:53,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855828369] [2022-11-16 20:20:53,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:20:53,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:20:53,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:53,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:20:53,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-11-16 20:20:53,096 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:20:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:53,665 INFO L93 Difference]: Finished difference Result 153 states and 198 transitions. [2022-11-16 20:20:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 20:20:53,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2022-11-16 20:20:53,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:53,667 INFO L225 Difference]: With dead ends: 153 [2022-11-16 20:20:53,667 INFO L226 Difference]: Without dead ends: 145 [2022-11-16 20:20:53,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 20:20:53,671 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 85 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:53,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 171 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:20:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-16 20:20:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 85. [2022-11-16 20:20:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 20:20:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-11-16 20:20:53,714 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 32 [2022-11-16 20:20:53,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:53,714 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-11-16 20:20:53,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:20:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-11-16 20:20:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 20:20:53,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:53,722 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:20:53,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:20:53,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:53,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:53,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1952453089, now seen corresponding path program 7 times [2022-11-16 20:20:53,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:53,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766178357] [2022-11-16 20:20:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:53,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:53,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:20:53,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009109202] [2022-11-16 20:20:53,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:20:53,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:20:53,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:20:53,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:20:53,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 20:20:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:54,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 20:20:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:20:54,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:20:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:54,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-11-16 20:20:54,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 20:20:54,191 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 29 treesize of output 28 [2022-11-16 20:20:54,243 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 0 case distinctions, treesize of input 67 treesize of output 55 [2022-11-16 20:20:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:54,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:54,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-11-16 20:20:55,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:55,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:55,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:55,887 INFO L321 Elim1Store]: treesize reduction 98, result has 47.0 percent of original size [2022-11-16 20:20:55,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 129 [2022-11-16 20:20:56,689 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-16 20:20:56,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2022-11-16 20:20:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:20:56,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:20:58,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:58,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766178357] [2022-11-16 20:20:58,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:20:58,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009109202] [2022-11-16 20:20:58,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009109202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:20:58,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433431830] [2022-11-16 20:20:58,553 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:20:58,553 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:20:58,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:20:58,554 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:20:58,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:20:58,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,668 INFO L321 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2022-11-16 20:20:58,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-16 20:20:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,769 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:20:58,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:20:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:20:58,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:58,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:58,938 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:20:58,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:20:59,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:20:59,031 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:20:59,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:20:59,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:20:59,244 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:20:59,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:20:59,373 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:20:59,374 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:02,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3262#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:02,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:02,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:21:02,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-16 20:21:02,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485043360] [2022-11-16 20:21:02,079 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 20:21:02,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 20:21:02,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 20:21:02,081 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:21:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:03,432 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2022-11-16 20:21:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 20:21:03,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2022-11-16 20:21:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:03,434 INFO L225 Difference]: With dead ends: 118 [2022-11-16 20:21:03,434 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 20:21:03,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=294, Invalid=2676, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 20:21:03,436 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:03,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 165 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 470 Invalid, 0 Unknown, 122 Unchecked, 0.8s Time] [2022-11-16 20:21:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 20:21:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-11-16 20:21:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 67 states have internal predecessors, (74), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-16 20:21:03,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2022-11-16 20:21:03,465 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 33 [2022-11-16 20:21:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:03,465 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2022-11-16 20:21:03,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:21:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2022-11-16 20:21:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 20:21:03,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:03,467 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:03,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:03,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 20:21:03,670 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1956226912, now seen corresponding path program 8 times [2022-11-16 20:21:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:03,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295907889] [2022-11-16 20:21:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:03,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:03,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732152407] [2022-11-16 20:21:03,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:21:03,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:03,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:03,700 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:03,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 20:21:03,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 20:21:03,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:21:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:21:03,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:04,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295907889] [2022-11-16 20:21:04,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:04,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732152407] [2022-11-16 20:21:04,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732152407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:04,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815438498] [2022-11-16 20:21:04,040 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:21:04,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:04,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:04,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:04,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:04,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:04,162 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:21:04,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:21:04,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:04,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:04,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:21:04,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:04,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:04,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:21:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:04,400 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:21:04,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:21:04,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:04,550 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:21:04,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:21:05,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:05,313 INFO L321 Elim1Store]: treesize reduction 53, result has 39.1 percent of original size [2022-11-16 20:21:05,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 224 treesize of output 186 [2022-11-16 20:21:05,684 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:21:05,691 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:08,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3855#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:08,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:08,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:08,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-16 20:21:08,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262336065] [2022-11-16 20:21:08,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:08,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:21:08,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:08,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:21:08,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 20:21:08,401 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:08,914 INFO L93 Difference]: Finished difference Result 177 states and 221 transitions. [2022-11-16 20:21:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 20:21:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2022-11-16 20:21:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:08,916 INFO L225 Difference]: With dead ends: 177 [2022-11-16 20:21:08,916 INFO L226 Difference]: Without dead ends: 174 [2022-11-16 20:21:08,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 20:21:08,917 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 112 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:08,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 157 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:21:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-16 20:21:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 116. [2022-11-16 20:21:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 73 states have internal predecessors, (81), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:21:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2022-11-16 20:21:08,954 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 34 [2022-11-16 20:21:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:08,954 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2022-11-16 20:21:08,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2022-11-16 20:21:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 20:21:08,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:08,955 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:08,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 20:21:09,156 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash 396188414, now seen corresponding path program 9 times [2022-11-16 20:21:09,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:09,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959538905] [2022-11-16 20:21:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:09,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:09,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:09,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031514817] [2022-11-16 20:21:09,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:21:09,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:09,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:09,207 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:09,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 20:21:09,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:21:09,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:09,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 20:21:09,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:21:09,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:09,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:09,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959538905] [2022-11-16 20:21:09,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:09,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031514817] [2022-11-16 20:21:09,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031514817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:09,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562322323] [2022-11-16 20:21:09,541 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:21:09,541 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:09,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:09,541 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:09,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,639 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:21:09,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:21:09,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:21:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:21:09,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:09,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:09,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:09,821 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:21:09,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:21:09,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:09,899 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:21:09,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:21:10,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:10,120 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:21:10,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:21:10,245 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:21:10,247 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:11,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4553#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:11,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:11,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:11,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-16 20:21:11,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874540553] [2022-11-16 20:21:11,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:11,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 20:21:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 20:21:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 20:21:11,990 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:12,584 INFO L93 Difference]: Finished difference Result 248 states and 327 transitions. [2022-11-16 20:21:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 20:21:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2022-11-16 20:21:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:12,587 INFO L225 Difference]: With dead ends: 248 [2022-11-16 20:21:12,587 INFO L226 Difference]: Without dead ends: 239 [2022-11-16 20:21:12,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 20:21:12,588 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 154 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:12,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 230 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:21:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-16 20:21:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 117. [2022-11-16 20:21:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.125) internal successors, (81), 74 states have internal predecessors, (81), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:21:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2022-11-16 20:21:12,632 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 34 [2022-11-16 20:21:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:12,632 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2022-11-16 20:21:12,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2022-11-16 20:21:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 20:21:12,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:12,634 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:12,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 20:21:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 20:21:12,839 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -513807329, now seen corresponding path program 10 times [2022-11-16 20:21:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009051359] [2022-11-16 20:21:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:12,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:12,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868415156] [2022-11-16 20:21:12,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:21:12,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:12,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:12,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:12,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 20:21:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:21:13,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-16 20:21:13,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:13,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:21:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:13,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-11-16 20:21:13,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-16 20:21:13,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 20:21:13,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 20:21:13,187 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 0 case distinctions, treesize of input 67 treesize of output 55 [2022-11-16 20:21:13,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-11-16 20:21:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:13,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:13,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:13,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:13,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:13,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2022-11-16 20:21:14,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:15,086 INFO L321 Elim1Store]: treesize reduction 132, result has 47.0 percent of original size [2022-11-16 20:21:15,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 165 [2022-11-16 20:21:16,654 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-16 20:21:16,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2022-11-16 20:21:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:21:16,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:18,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009051359] [2022-11-16 20:21:18,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868415156] [2022-11-16 20:21:18,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868415156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:21:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010367666] [2022-11-16 20:21:18,682 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:21:18,682 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:18,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:18,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:18,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:18,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,793 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:21:18,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:21:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:21:18,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:21:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:18,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:18,962 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:21:18,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:21:19,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:19,038 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:21:19,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:21:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:19,248 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:21:19,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:21:19,368 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:21:19,369 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:22,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5343#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:22,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:22,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:21:22,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-16 20:21:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264417228] [2022-11-16 20:21:22,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:22,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 20:21:22,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 20:21:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2395, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 20:21:22,252 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:21:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:24,483 INFO L93 Difference]: Finished difference Result 153 states and 186 transitions. [2022-11-16 20:21:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 20:21:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-11-16 20:21:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:24,485 INFO L225 Difference]: With dead ends: 153 [2022-11-16 20:21:24,485 INFO L226 Difference]: Without dead ends: 150 [2022-11-16 20:21:24,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=313, Invalid=3109, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 20:21:24,486 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:24,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 164 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 600 Invalid, 0 Unknown, 135 Unchecked, 1.1s Time] [2022-11-16 20:21:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-16 20:21:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2022-11-16 20:21:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 84 states have (on average 1.130952380952381) internal successors, (95), 87 states have internal predecessors, (95), 36 states have call successors, (36), 16 states have call predecessors, (36), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-16 20:21:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2022-11-16 20:21:24,545 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 35 [2022-11-16 20:21:24,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:24,545 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2022-11-16 20:21:24,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:21:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2022-11-16 20:21:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 20:21:24,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:24,549 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:24,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:24,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:24,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1341095710, now seen corresponding path program 11 times [2022-11-16 20:21:24,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:24,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551616586] [2022-11-16 20:21:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:24,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:24,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:24,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363142606] [2022-11-16 20:21:24,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:21:24,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:24,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:24,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 20:21:25,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 20:21:25,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:25,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:21:25,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:21:25,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:25,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551616586] [2022-11-16 20:21:25,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363142606] [2022-11-16 20:21:25,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363142606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [439091762] [2022-11-16 20:21:25,281 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:21:25,281 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:25,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:25,282 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:25,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,391 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:21:25,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:21:25,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:21:25,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:21:25,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:25,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:25,571 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:21:25,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:21:25,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:25,643 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:21:25,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:21:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:25,854 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:21:25,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:21:25,957 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:21:25,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:27,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6062#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:27,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:27,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:27,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-16 20:21:27,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924081859] [2022-11-16 20:21:27,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:27,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:21:27,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:27,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:21:27,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 20:21:27,604 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:28,310 INFO L93 Difference]: Finished difference Result 227 states and 282 transitions. [2022-11-16 20:21:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 20:21:28,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2022-11-16 20:21:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:28,313 INFO L225 Difference]: With dead ends: 227 [2022-11-16 20:21:28,313 INFO L226 Difference]: Without dead ends: 224 [2022-11-16 20:21:28,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 20:21:28,314 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 115 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:28,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 233 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:21:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-16 20:21:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2022-11-16 20:21:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 93 states have internal predecessors, (102), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-16 20:21:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2022-11-16 20:21:28,360 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 36 [2022-11-16 20:21:28,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:28,360 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2022-11-16 20:21:28,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2022-11-16 20:21:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 20:21:28,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:28,362 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:28,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 20:21:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:28,568 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:28,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1251526784, now seen corresponding path program 12 times [2022-11-16 20:21:28,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:28,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839897870] [2022-11-16 20:21:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:28,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:28,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:28,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685718285] [2022-11-16 20:21:28,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:21:28,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:28,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:28,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 20:21:28,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:21:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:21:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:21:28,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:28,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:28,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839897870] [2022-11-16 20:21:28,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:28,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685718285] [2022-11-16 20:21:28,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685718285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:28,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976956758] [2022-11-16 20:21:28,980 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:21:28,980 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:28,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:28,981 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:28,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:29,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:29,108 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:21:29,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:21:29,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:29,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:21:29,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:29,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:29,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:21:29,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:29,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:29,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:29,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:29,318 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:21:29,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:21:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:29,434 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:21:29,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:21:30,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:30,152 INFO L321 Elim1Store]: treesize reduction 53, result has 39.1 percent of original size [2022-11-16 20:21:30,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 224 treesize of output 186 [2022-11-16 20:21:30,478 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:21:30,484 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:33,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6907#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:33,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:33,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:33,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-16 20:21:33,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172723872] [2022-11-16 20:21:33,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:33,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 20:21:33,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:33,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 20:21:33,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 20:21:33,140 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:34,031 INFO L93 Difference]: Finished difference Result 373 states and 496 transitions. [2022-11-16 20:21:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 20:21:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2022-11-16 20:21:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:34,034 INFO L225 Difference]: With dead ends: 373 [2022-11-16 20:21:34,034 INFO L226 Difference]: Without dead ends: 363 [2022-11-16 20:21:34,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 20:21:34,036 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 295 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:34,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 303 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:21:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-16 20:21:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 149. [2022-11-16 20:21:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.120879120879121) internal successors, (102), 94 states have internal predecessors, (102), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-16 20:21:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 182 transitions. [2022-11-16 20:21:34,096 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 182 transitions. Word has length 36 [2022-11-16 20:21:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:34,096 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 182 transitions. [2022-11-16 20:21:34,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 182 transitions. [2022-11-16 20:21:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 20:21:34,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:34,097 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:34,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:34,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 20:21:34,298 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:34,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1376021151, now seen corresponding path program 13 times [2022-11-16 20:21:34,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:34,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684485890] [2022-11-16 20:21:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:34,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:34,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:34,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723965672] [2022-11-16 20:21:34,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:21:34,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:34,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:34,322 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:34,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 20:21:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:21:34,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-16 20:21:34,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:34,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:21:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 20:21:34,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-16 20:21:34,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:21:34,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:21:34,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,714 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 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-16 20:21:34,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 69 [2022-11-16 20:21:34,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:34,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 99 [2022-11-16 20:21:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:35,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:35,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:35,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:35,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:35,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2022-11-16 20:21:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:36,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:36,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:37,121 INFO L321 Elim1Store]: treesize reduction 166, result has 47.0 percent of original size [2022-11-16 20:21:37,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 201 [2022-11-16 20:21:39,698 INFO L321 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-11-16 20:21:39,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2022-11-16 20:21:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:21:39,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:43,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:43,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684485890] [2022-11-16 20:21:43,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:43,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723965672] [2022-11-16 20:21:43,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723965672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:21:43,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1783261592] [2022-11-16 20:21:43,228 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:21:43,228 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:43,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:43,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:43,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:43,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,329 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:21:43,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:21:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:21:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:21:43,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:43,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:43,505 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:21:43,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:21:43,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:43,586 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:21:43,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:21:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:43,784 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:21:43,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:21:43,895 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:21:43,896 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:47,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7970#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:47,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:47,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:21:47,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-16 20:21:47,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715646561] [2022-11-16 20:21:47,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:47,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 20:21:47,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 20:21:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3113, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 20:21:47,402 INFO L87 Difference]: Start difference. First operand 149 states and 182 transitions. Second operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:21:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:50,757 INFO L93 Difference]: Finished difference Result 186 states and 226 transitions. [2022-11-16 20:21:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 20:21:50,757 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2022-11-16 20:21:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:50,758 INFO L225 Difference]: With dead ends: 186 [2022-11-16 20:21:50,759 INFO L226 Difference]: Without dead ends: 183 [2022-11-16 20:21:50,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=372, Invalid=4050, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 20:21:50,760 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:50,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 161 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 744 Invalid, 0 Unknown, 139 Unchecked, 1.4s Time] [2022-11-16 20:21:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-16 20:21:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2022-11-16 20:21:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 107 states have internal predecessors, (116), 45 states have call successors, (45), 20 states have call predecessors, (45), 20 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-16 20:21:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2022-11-16 20:21:50,837 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 37 [2022-11-16 20:21:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:50,838 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2022-11-16 20:21:50,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:21:50,838 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2022-11-16 20:21:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 20:21:50,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:50,839 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:50,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:51,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 20:21:51,046 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:51,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1225628512, now seen corresponding path program 14 times [2022-11-16 20:21:51,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:51,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077785453] [2022-11-16 20:21:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:51,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:51,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:51,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314824823] [2022-11-16 20:21:51,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:21:51,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:51,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:51,068 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:51,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 20:21:51,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 20:21:51,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:51,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:21:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:21:51,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:51,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077785453] [2022-11-16 20:21:51,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314824823] [2022-11-16 20:21:51,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314824823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587126631] [2022-11-16 20:21:51,556 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:21:51,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:51,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:51,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:51,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,661 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:21:51,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:21:51,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2022-11-16 20:21:51,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:21:51,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:51,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:51,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:51,825 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-16 20:21:51,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 406 treesize of output 392 [2022-11-16 20:21:51,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:51,903 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:21:51,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:21:52,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:52,108 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:21:52,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:21:52,204 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:21:52,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:53,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8810#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:53,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:53,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:53,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-16 20:21:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427546820] [2022-11-16 20:21:53,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 20:21:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 20:21:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 20:21:53,866 INFO L87 Difference]: Start difference. First operand 169 states and 206 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:21:54,732 INFO L93 Difference]: Finished difference Result 278 states and 344 transitions. [2022-11-16 20:21:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 20:21:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2022-11-16 20:21:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:21:54,734 INFO L225 Difference]: With dead ends: 278 [2022-11-16 20:21:54,734 INFO L226 Difference]: Without dead ends: 275 [2022-11-16 20:21:54,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 20:21:54,740 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 163 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:21:54,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 302 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:21:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-16 20:21:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 180. [2022-11-16 20:21:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 109 states have (on average 1.128440366972477) internal successors, (123), 113 states have internal predecessors, (123), 49 states have call successors, (49), 21 states have call predecessors, (49), 21 states have return successors, (49), 45 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-16 20:21:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 221 transitions. [2022-11-16 20:21:54,842 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 221 transitions. Word has length 38 [2022-11-16 20:21:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:21:54,843 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 221 transitions. [2022-11-16 20:21:54,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:21:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 221 transitions. [2022-11-16 20:21:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 20:21:54,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:21:54,844 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:21:54,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 20:21:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:55,052 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:21:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:21:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 292702078, now seen corresponding path program 15 times [2022-11-16 20:21:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:21:55,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483017141] [2022-11-16 20:21:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:21:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:21:55,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:21:55,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229095524] [2022-11-16 20:21:55,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:21:55,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:21:55,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:55,077 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:21:55,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 20:21:55,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:21:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:21:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 20:21:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:21:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:21:55,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:21:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:21:55,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:21:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483017141] [2022-11-16 20:21:55,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:21:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229095524] [2022-11-16 20:21:55,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229095524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:21:55,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2062160697] [2022-11-16 20:21:55,564 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:21:55,564 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:21:55,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:21:55,565 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:21:55,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:21:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:55,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:55,675 INFO L321 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2022-11-16 20:21:55,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-16 20:21:55,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:55,778 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:21:55,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:21:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:55,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:21:55,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:55,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:55,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:55,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:55,961 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:21:55,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:21:56,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:21:56,095 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:21:56,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:21:56,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:21:56,761 INFO L321 Elim1Store]: treesize reduction 53, result has 39.1 percent of original size [2022-11-16 20:21:56,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 224 treesize of output 186 [2022-11-16 20:21:57,082 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:21:57,088 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:21:59,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9804#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:21:59,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:21:59,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:21:59,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-16 20:21:59,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681524995] [2022-11-16 20:21:59,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:21:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 20:21:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:21:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 20:21:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 20:21:59,832 INFO L87 Difference]: Start difference. First operand 180 states and 221 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:22:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:01,686 INFO L93 Difference]: Finished difference Result 524 states and 701 transitions. [2022-11-16 20:22:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 20:22:01,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2022-11-16 20:22:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:01,689 INFO L225 Difference]: With dead ends: 524 [2022-11-16 20:22:01,689 INFO L226 Difference]: Without dead ends: 513 [2022-11-16 20:22:01,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 20:22:01,691 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 606 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:01,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 308 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 20:22:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-16 20:22:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 181. [2022-11-16 20:22:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 114 states have internal predecessors, (123), 49 states have call successors, (49), 21 states have call predecessors, (49), 21 states have return successors, (49), 45 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-16 20:22:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2022-11-16 20:22:01,778 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 38 [2022-11-16 20:22:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:01,779 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2022-11-16 20:22:01,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:22:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2022-11-16 20:22:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 20:22:01,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:01,780 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:01,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:01,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 20:22:01,986 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:01,987 INFO L85 PathProgramCache]: Analyzing trace with hash 659906591, now seen corresponding path program 16 times [2022-11-16 20:22:01,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:01,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498405359] [2022-11-16 20:22:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:01,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:02,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:02,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604634871] [2022-11-16 20:22:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:22:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:02,015 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:02,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 20:22:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:02,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 159 conjunts are in the unsatisfiable core [2022-11-16 20:22:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:02,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:22:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 20:22:02,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:22:02,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:22:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,467 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 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-16 20:22:02,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-11-16 20:22:02,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 93 [2022-11-16 20:22:02,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 123 [2022-11-16 20:22:02,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:02,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 135 [2022-11-16 20:22:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:05,398 INFO L321 Elim1Store]: treesize reduction 200, result has 46.9 percent of original size [2022-11-16 20:22:05,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 237 [2022-11-16 20:22:09,805 INFO L321 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2022-11-16 20:22:09,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 470 treesize of output 218 [2022-11-16 20:22:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:22:09,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:22:30,602 WARN L233 SmtUtils]: Spent 14.05s on a formula simplification. DAG size of input: 34 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:22:31,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:31,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498405359] [2022-11-16 20:22:31,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:22:31,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604634871] [2022-11-16 20:22:31,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604634871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:22:31,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347709049] [2022-11-16 20:22:31,321 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:22:31,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:22:31,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:22:31,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:22:31,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:22:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:31,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:31,429 INFO L321 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2022-11-16 20:22:31,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-16 20:22:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:31,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:31,531 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:22:31,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:22:31,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:31,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:22:31,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:31,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:31,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:31,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:31,753 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:22:31,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:22:31,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:31,975 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:22:31,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:22:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:32,172 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:22:32,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:22:32,280 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:22:32,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:22:36,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11191#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:22:36,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:22:36,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:22:36,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-11-16 20:22:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58570744] [2022-11-16 20:22:36,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 20:22:36,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 20:22:36,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:36,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 20:22:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=3688, Unknown=1, NotChecked=0, Total=4032 [2022-11-16 20:22:36,492 INFO L87 Difference]: Start difference. First operand 181 states and 221 transitions. Second operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:22:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:39,703 INFO L93 Difference]: Finished difference Result 219 states and 267 transitions. [2022-11-16 20:22:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 20:22:39,704 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 39 [2022-11-16 20:22:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:39,704 INFO L225 Difference]: With dead ends: 219 [2022-11-16 20:22:39,705 INFO L226 Difference]: Without dead ends: 216 [2022-11-16 20:22:39,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=381, Invalid=4174, Unknown=1, NotChecked=0, Total=4556 [2022-11-16 20:22:39,707 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:39,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 202 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 865 Invalid, 0 Unknown, 91 Unchecked, 1.9s Time] [2022-11-16 20:22:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-16 20:22:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2022-11-16 20:22:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 120 states have (on average 1.125) internal successors, (135), 124 states have internal predecessors, (135), 53 states have call successors, (53), 23 states have call predecessors, (53), 23 states have return successors, (53), 49 states have call predecessors, (53), 53 states have call successors, (53) [2022-11-16 20:22:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 241 transitions. [2022-11-16 20:22:39,825 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 241 transitions. Word has length 39 [2022-11-16 20:22:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:39,825 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 241 transitions. [2022-11-16 20:22:39,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 20:22:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 241 transitions. [2022-11-16 20:22:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 20:22:39,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:39,826 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:39,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:40,033 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:40,033 INFO L85 PathProgramCache]: Analyzing trace with hash -841655394, now seen corresponding path program 17 times [2022-11-16 20:22:40,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:40,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609603128] [2022-11-16 20:22:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:40,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:40,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60682935] [2022-11-16 20:22:40,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:22:40,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:40,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:40,060 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:40,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 20:22:40,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 20:22:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:22:40,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:22:40,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:22:40,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:22:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:22:40,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609603128] [2022-11-16 20:22:40,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:22:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60682935] [2022-11-16 20:22:40,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60682935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:22:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502336084] [2022-11-16 20:22:40,667 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:22:40,667 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:22:40,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:22:40,667 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:22:40,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:22:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:40,778 INFO L321 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2022-11-16 20:22:40,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-16 20:22:40,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:40,891 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:22:40,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:22:40,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:40,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:40,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:22:40,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:40,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:40,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:40,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:40,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:41,088 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:22:41,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:22:41,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:41,219 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:22:41,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:22:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:41,890 INFO L321 Elim1Store]: treesize reduction 53, result has 39.1 percent of original size [2022-11-16 20:22:41,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 224 treesize of output 186 [2022-11-16 20:22:42,208 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-16 20:22:42,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:22:44,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12136#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:22:44,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:22:44,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:22:44,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-11-16 20:22:44,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389781611] [2022-11-16 20:22:44,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:22:44,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 20:22:44,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 20:22:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 20:22:44,967 INFO L87 Difference]: Start difference. First operand 197 states and 241 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:22:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:46,245 INFO L93 Difference]: Finished difference Result 326 states and 403 transitions. [2022-11-16 20:22:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 20:22:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 40 [2022-11-16 20:22:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:46,247 INFO L225 Difference]: With dead ends: 326 [2022-11-16 20:22:46,247 INFO L226 Difference]: Without dead ends: 323 [2022-11-16 20:22:46,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 20:22:46,248 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 159 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:46,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 365 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 20:22:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-16 20:22:46,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 208. [2022-11-16 20:22:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.126984126984127) internal successors, (142), 130 states have internal predecessors, (142), 57 states have call successors, (57), 24 states have call predecessors, (57), 24 states have return successors, (57), 53 states have call predecessors, (57), 57 states have call successors, (57) [2022-11-16 20:22:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2022-11-16 20:22:46,376 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 40 [2022-11-16 20:22:46,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:46,376 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2022-11-16 20:22:46,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:22:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2022-11-16 20:22:46,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 20:22:46,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:46,377 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:46,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:46,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:46,584 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:46,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1018047360, now seen corresponding path program 18 times [2022-11-16 20:22:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:46,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554618500] [2022-11-16 20:22:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:46,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:46,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958078975] [2022-11-16 20:22:46,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:22:46,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:46,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:46,608 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:46,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 20:22:46,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:22:46,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:22:46,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 20:22:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:22:47,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:22:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 20:22:47,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:47,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554618500] [2022-11-16 20:22:47,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:22:47,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958078975] [2022-11-16 20:22:47,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958078975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:22:47,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914492087] [2022-11-16 20:22:47,321 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-16 20:22:47,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:22:47,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:22:47,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:22:47,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:22:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:47,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:47,448 INFO L321 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2022-11-16 20:22:47,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-16 20:22:47,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:47,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:47,553 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-16 20:22:47,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-16 20:22:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:47,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 20:22:47,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:47,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:47,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:47,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:47,759 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-16 20:22:47,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 399 treesize of output 397 [2022-11-16 20:22:47,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:22:47,918 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 20:22:47,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-16 20:22:48,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:48,122 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-16 20:22:48,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 20:22:48,256 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-16 20:22:48,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:22:50,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13267#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:22:50,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:22:50,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:22:50,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-11-16 20:22:50,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42790010] [2022-11-16 20:22:50,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 20:22:50,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 20:22:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 20:22:50,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1414, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 20:22:50,151 INFO L87 Difference]: Start difference. First operand 208 states and 256 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:22:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:52,666 INFO L93 Difference]: Finished difference Result 700 states and 942 transitions. [2022-11-16 20:22:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 20:22:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 40 [2022-11-16 20:22:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:52,670 INFO L225 Difference]: With dead ends: 700 [2022-11-16 20:22:52,671 INFO L226 Difference]: Without dead ends: 688 [2022-11-16 20:22:52,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=746, Invalid=3676, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 20:22:52,682 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 856 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:52,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 471 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 20:22:52,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-16 20:22:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 209. [2022-11-16 20:22:52,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 131 states have internal predecessors, (142), 57 states have call successors, (57), 24 states have call predecessors, (57), 24 states have return successors, (57), 53 states have call predecessors, (57), 57 states have call successors, (57) [2022-11-16 20:22:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 256 transitions. [2022-11-16 20:22:52,778 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 256 transitions. Word has length 40 [2022-11-16 20:22:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:52,779 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 256 transitions. [2022-11-16 20:22:52,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:22:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 256 transitions. [2022-11-16 20:22:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 20:22:52,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:52,780 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:52,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 20:22:52,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 20:22:52,987 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash -321828639, now seen corresponding path program 19 times [2022-11-16 20:22:52,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:52,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771580361] [2022-11-16 20:22:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:53,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 20:22:53,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737026266] [2022-11-16 20:22:53,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 20:22:53,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:22:53,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:53,020 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:22:53,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5487982-c726-45c7-a038-84d64e9cb3a1/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 20:22:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:53,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 170 conjunts are in the unsatisfiable core [2022-11-16 20:22:53,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:22:53,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:22:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:53,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-11-16 20:22:53,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 20:22:53,784 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 29 treesize of output 28 [2022-11-16 20:22:53,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:53,842 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 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-16 20:22:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:53,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:53,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-11-16 20:22:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2022-11-16 20:22:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2022-11-16 20:22:54,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 141 [2022-11-16 20:22:54,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:54,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 159 [2022-11-16 20:22:56,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:56,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:22:57,221 INFO L321 Elim1Store]: treesize reduction 234, result has 46.9 percent of original size [2022-11-16 20:22:57,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 44 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 14 case distinctions, treesize of input 162 treesize of output 273 [2022-11-16 20:23:03,897 INFO L321 Elim1Store]: treesize reduction 53, result has 7.0 percent of original size [2022-11-16 20:23:03,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 600 treesize of output 276 [2022-11-16 20:23:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 20:23:04,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:24:50,595 WARN L233 SmtUtils]: Spent 47.98s on a formula simplification. DAG size of input: 28 DAG size of output: 25 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 20:24:50,596 INFO L321 Elim1Store]: treesize reduction 17, result has 66.0 percent of original size [2022-11-16 20:24:50,596 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 12681234 treesize of output 8101938